In 2021 a team of paleontologists led by Charles Marshall at Berkeley did something clever: they estimated not how many T. rex we have dug up, but how many ever existed.

Their headline answer was about 2.5 billion, spread across the roughly 2.4 million years the species was around, although the uncertainty ranged from 140 million to 42 billion. At any given moment, the central estimate put about 20,000 adults on the continent at once, generation after generation, for longer than modern humans have existed. 

Now set that against how many we have found. The first partial skeleton recognized as T. rex was unearthed by Barnum Brown in Montana in 1902, and it became the name-bearing specimen when Henry Fairfield Osborn formally named the species in 1905.

By 2021, fewer than a hundred T. rex individuals had been found, many represented by a single fossilized bone. Only about 32 were relatively well-preserved post-juveniles held in public museums.

On Marshall’s estimate, that works out at roughly one recovered specimen for every 80 million post-juvenile animals that lived and died. Much of our physical knowledge of the animal rests on that extraordinarily narrow sample.

The math of what is missing

That fossil recovery rate that falls out is comically small.

However, for a T. rex to become a fossil you could visit, it had to die in the right place, get buried fast enough to escape scavengers and rot, survive tens of millions of years of erosion and geological change, and then happen to surface in a spot where a human being was looking. Almost nothing clears all of those hurdles.

The famous individuals bring this home. The great specimens have names, because there are few enough of them to name: Sue in Chicago, Stan, a short list of others that get written about again and again. When a single skeleton can anchor decades of research and a museum’s entire dinosaur hall, you are not looking at a well-stocked archive. You are looking at the handful of tickets that happened to win a very long lottery.

What we build on almost nothing

T. rex is not the poorly documented case. It is one of the better understood dinosaurs we have, a giant, sturdy-boned predator from rock we know how to read, hunted for over a century by people who badly wanted to find it.

If this is what good coverage looks like, roughly one relatively well-preserved post-juvenile in 80 million, then for most creatures that ever lived the record is not thin. It is blank. Whole species, whole families, came and went and left nothing a person will ever hold.

We are not usually reminded of that when we stand in front of the mounted skeleton. The display is confident. The posture, the coloring in the illustration beside it, the running speed on the little plaque, all of it reads as settled fact. A great deal of it is careful, honest extrapolation from a few bones and a lot of comparison with living animals, which is real science and often turns out right. But the certainty of the presentation and the scarcity of the evidence sit in an odd relationship, and I think it is worth holding both in mind at once.

None of this is a knock on paleontology. If anything it is the opposite. The impressive thing is not that our picture of T. rex has gaps. It is that anyone can say something reliable at all, starting from such a tiny fraction of the animals that lived and reasoning outward with that much care.

The wonder is not that we know so little. It is how much we have managed to reconstruct from so nearly nothing.

The post A 2021 estimate suggested that about 2.5 billion Tyrannosaurus rex lived, while only 32 relatively well-preserved post-juvenile specimens were then held in public museums — roughly one for every 80 million animals. And T. rex is one of the better represented large theropods appeared first on Space Daily.

Picture the den in early summer. Some of the adult wolves have left to hunt, which can mean being gone for the better part of a day or longer and covering ground a person would struggle to walk.

The new pups are too small to follow and too helpless to leave truly alone. So they are not left alone. A pack member often stays behind, and that wolf may be an older brother or sister from a previous litter, on babysitting duty.

Wolves are one of a fairly small number of animals where the raising of the young is a group effort rather than a job for two. Biologists call it alloparenting, care given by animals other than the mother and father. In a wolf family it often falls to yearlings and other nonbreeding wolves that have not yet left to start families of their own. The Wolf Conservation Center describes them babysitting the pups, regurgitating food for them and playing with them. 

The most striking part, to me, is the food. A yearling that has fed at a kill will travel back to the den and regurgitate meat for the pups, delivering a meal it carried home inside itself. It is not glamorous. It is also a genuinely generous act by an animal that could simply have eaten and kept walking. The parents do it too, but research on wild wolves found that all adult pack members, including yearlings, regurgitated food, so the pups can be fed from several directions at once.

There is a quiet division of labor worth noticing. In one Idaho study, nonbreeding females attended dens and rendezvous sites about twice as often as nonbreeding males, suggesting that older sisters may take a closer hand in caring for the new pups.

The younger wolves may also be gaining practical experience. By the time a yearling leaves to raise its own litter, it may already have spent a season or two feeding, guarding, and minding pups. It has, in the most practical way, learned the job before it needs it.

All of this can have a hard payoff. Spreading the care across the pack means the pups can be watched, fed, and defended while other wolves hunt, part of what makes a pack so resilient. In a long-term study of reintroduced red wolves, helpers were associated with higher pup mass and survival at low population density, although the survival benefit disappeared at high density. Gray-wolf research likewise shows that the relationship between pack size and surviving pups varies with ecological conditions. Extra hands are not automatically better in every place and every year, but they let a wolf family divide the essential work of guarding and provisioning.

What I like about it is how unfamiliar it makes a familiar animal look. We are used to thinking of wolves through the language of dominance and the lone hunter. The reality on the ground, in early summer, is a young pack member staying home to mind the babies while others hunt, and then bringing dinner back for everyone.

It is closer to the cooperative way humans have raised children across much of our history, with older children and other relatives helping to care for and provision the young.

The pups will grow, and in a year or two some of the babysitters will leave to become parents themselves, carrying the whole routine somewhere new. It is a small, well-run system, repeated from one generation to the next

The post In a wolf pack, older brothers and sisters often help with the babysitting. While some adults are away hunting, wolves from previous litters guard the new pups and carry food back for them — an all-hands approach to raising the young that can improve a pup’s chances of surviving appeared first on Space Daily.

There is something difficult to grasp about the number of lakes in Canada. A few thousand would already seem excessive. Tens of thousands would be hard to picture. Canada has more than two million by federal estimates, scattered across a landscape shaped by ice.

The number is so large that it almost stops meaning anything. You could visit a different Canadian lake every day for an entire lifetime and still see only a small fraction of them. On a map they appear as blue flecks, crowded together across the north, but each one is a real body of water with its own shoreline, islands, depths and surrounding ecosystem.

What does “60 per cent of the world’s lakes” mean?

The often repeated claim that Canada holds around 60 per cent of the world’s lakes needs some qualification. There is no universally agreed count of every lake on Earth, because the result depends on what size of body is included and how lakes are distinguished from ponds, reservoirs and seasonal water.

One of the most widely used global databases, HydroLAKES, maps about 1.4 million lakes and reservoirs with a surface area of at least ten hectares. According to research describing the database, roughly 62 per cent of those water bodies are in Canada.

That does not mean Canada contains 62 per cent of the world’s freshwater. It means that nearly two-thirds of the lakes included in that particular global dataset lie inside Canada. The country nevertheless holds an enormous amount of water, and fresh water covers about eight per cent of its surface area.

What the ice left behind

The explanation lies largely in the Ice Ages. During repeated periods of glaciation, much of Canada was covered by continental ice sheets several kilometres thick. These were not static blocks of ice. They moved slowly across the land, grinding against the bedrock beneath them.

As the glaciers advanced and retreated, they scraped away soil and rock, deepened existing valleys and gouged countless depressions into the surface. When the climate warmed and the ice melted, water collected in those hollows.

The glaciers also carried enormous quantities of stone, sand and clay. As they withdrew, they left behind ridges and irregular piles of debris that blocked rivers and trapped meltwater. Some lakes formed in basins carved directly into rock. Others developed behind natural dams of glacial sediment.

This process happened across an immense area. The Canadian Shield, which stretches around Hudson Bay and across much of central and eastern Canada, is particularly full of exposed rock, shallow soil and water-filled depressions. From the air, much of the region looks less like solid land dotted with lakes than a broken mixture of rock, forest and water.

A landscape made of water

Some Canadian lakes are among the largest in the world. The Great Bear Lake and Great Slave Lake dominate the Northwest Territories, while parts of four of the five Great Lakes lie within Canada. But the extraordinary total comes mainly from the vast number of smaller lakes scattered across the country.

Many are remote enough to have no roads, settlements or permanent names. Some can be reached only by aircraft, canoe or long journeys through forest and tundra. Others sit within sight of towns and cities, forming part of ordinary Canadian life through fishing, swimming, transport, tourism and hydroelectric power.

The abundance of lakes also creates problems. Water may appear limitless, but it is unevenly distributed, often far from the country’s largest population centres. Pollution, warming temperatures, invasive species and changing rainfall patterns can still damage individual lakes, no matter how much water exists elsewhere.

Closing thoughts

Standing beside one cold lake in the Canadian bush, there would be no way to sense that it was one of more than two million. That is the odd thing about scale. From the shore, the lake is simply a place: water against rock, trees reflected on the surface, perhaps an island in the distance. Only from the level of a map or a database does it become part of something almost impossible to imagine. 

The post More than two million lakes sit inside a single country, gouged out by Ice Age glaciers that spent tens of thousands of years grinding it into a landscape of water appeared first on Space Daily.

In the middle of the nineteenth century, a Dutch army recruit stood on average around five feet five inches. That was short even for the time, shorter than many of his European and American contemporaries, and nobody looking at the Netherlands then would have picked it as the future home of some of the tallest people on Earth. Yet that is exactly what happened. Young Dutch men born in the Netherlands now measure nearly 1.84 metres on average, almost exactly six feet, and the country consistently ranks among the world’s tallest. In the space of about 150 years, one of the shortest populations became one of the tallest.

Twenty centimetres in a century and a half

The scale of the change is easy to say and hard to feel. Dutch men gained roughly 20 centimetres, close to eight inches, between the mid-nineteenth century and the modern era. That is not the kind of drift you expect from a stable population. It is a population visibly rebuilding itself, generation by generation, each cohort of children arriving taller than their parents for decade after decade until the whole nation had grown into a different shape.

Height works this way because it is only partly written in your genes. Your genes strongly influence the range of height you might reach. Where you fall within that range depends heavily on the years between birth and adulthood: whether you got enough good food, whether illness kept interrupting your growth, and whether the conditions around you let a body spend energy on getting tall rather than just getting through. A child who is well fed and rarely sick is more likely to grow toward the top of that range. A child who is not, may not. Multiply that across millions of children and stature becomes a kind of national report card.

Milk, money and doctors, not evolution

So what changed in the Netherlands? The answer is less dramatic than the transformation, and I think that is part of what makes it interesting.

The country got richer, and it got healthier. As researchers behind a Dutch Growth Study concluded, “Main contributors to the increase in height may be improved nutrition, child health, and hygiene, and a reduction of family size.” Prosperity, diet, healthcare and hygiene pulled in the same direction for generations, and the population climbed.

There was, for a while, a more exciting theory. In 2015 a study in a Royal Society journal suggested the Dutch might also be evolving taller, because taller Dutch men appeared to be having slightly more children, which could nudge the genes associated with height upward over time. It is a genuinely appealing idea, natural selection caught in the act in a modern European country. But it is worth being careful here, because the same lead researcher later put numbers on it. A 2023 simulation estimated that natural selection could account for only 0.07 to 0.36 centimetres of the change between 1850 and 2000. Against a gain of nearly 20 centimetres, that is a rounding error. The dramatic explanation turns out to be a footnote, and the dull one, better food and better health, did nearly all the work.

What a body remembers

I keep coming back to the idea that a population’s height is a physical record of its recent past. You cannot easily fake it or rush it, and it does not respond to a single good year. It responds to conditions sustained across a childhood, and then across many childhoods in a row.

When a country gets taller the way the Netherlands did, the bodies of its people are, in a real sense, remembering decades of enough food and decent medicine. The change is written into skeletons before it shows up in any history book.

It cuts the other way too. When researchers see average height stall or fall in a population, it can point to something going wrong in childhood: nutrition slipping, healthcare thinning out, or hard years landing on the young. 

The Dutch story is often told as a curiosity, a fun fact about a nation of unusually tall people ducking under doorframes. I think it is better read as evidence of something quietly hopeful. Give children enough to eat and keep them healthy, reliably, for long enough, and you can watch the result stand up in a crowd a century later. The Netherlands did not stumble into being tall. It fed and cared for a very long line of children, and the height is what that looks like from the outside.

The post In the mid-nineteenth century, the Dutch were among the shortest people in Europe. Today they remain among the tallest on the planet, with young men standing about 1.83 metres on average. Rising prosperity, better nutrition and improved healthcare added nearly 20 centimetres in roughly 150 years appeared first on Space Daily.

The Great Pyramid of Giza is built from something like 2.3 million stone blocks, averaging about 2.5 tons each, and it took roughly 20 years to build. Divide one number by the other and the pace reads like a typo. A block set, then the next, then the next, every few minutes, for two decades without stopping. 

It isn’t a curiosity about one heavy rock. It’s a claim about a whole human system holding a steady tempo, day after day, for longer than most modern building projects, with no engine anywhere in the chain.

The math is almost embarrassingly simple, which is part of what makes it land. A 2025 paper in npj Heritage Science lays out the standard figures: about 2.3 million blocks of around 2.5 tons each, and a required pace of roughly one block every one to three minutes across a 20-year build of long working days. Squeeze the schedule and it gets worse. The same paper notes that a 10-year build would need a block set every 30 to 90 seconds.

The blocks weren’t uniform, either. The lowest rows carry stones reaching around 10 tons or more, so “some weighing several tonnes” isn’t rhetorical. All told, laborers moved into position six and a half million tons of stone.

What that pace really describes isn’t a single feat of strength. It’s a feat of scheduling, repeated a couple of million times.

A block every few minutes only works if you stop picturing one crew doing it all. Nobody was setting a stone, catching their breath, and setting the next. The pace is an average across a whole site working at once, with many teams quarrying, hauling, shaping, and placing in parallel, so the finished total climbs at that headline speed even though no single person is moving that fast.

That reframing is what modern Egyptology has spent decades building. The old image of whip-driven slaves has been replaced with evidence of an organized, housed, and fed workforce. Egyptologists Mark Lehner and Zahi Hawass estimate the peak labor force at 20,000 to 30,000 people. Not all of them were lifting stone. Vaclav Smil’s energy-based calculation for IEEE Spectrum puts the core stone-raising and placing crew at only about 3,300 workers, far from the 100,000 men the ancient historian Herodotus reported working in three-month shifts.

Perhaps the most intriguing evidence for how the tempo held came out of the ground fairly recently. In 2013, the French Egyptologist Pierre Tallet dug up a set of papyri at Wadi al-Jarf, the oldest known papyri in the world. Among them was the journal of an official named Merer, who led a crew of some 200 men and recorded ferrying fine limestone by boat to the Great Pyramid. It’s a logistics record, dated to the 27th year of Khufu’s reign, describing the movement of stone in plain administrative terms.

Where the workers slept has also come into focus. Lehner’s team dug up long stone galleries near the pyramids and reads them as living quarters. “We now see the enigmatic rows of long galleries…as barracks housing for a rotating labor force, perhaps as large as 1,600 to 2,000 workers,” he has said, careful to call it a working hypothesis rather than settled fact. Standing in one of them, he reportedly put it more bluntly: “This is a hell of a barn!” What interested him was less the stone than the society it required. His larger argument, and it’s his interpretation rather than consensus, is about “how the pyramids built Egypt”: that organizing the workforce may have done as much to shape the state as the state did to shape the pyramid.

The build itself was probably more clever than brute. Most modern scholars think the blocks were moved with ramps and sledges rather than any single heroic lift, and the recent npj Heritage Science paper argues the internal passages themselves may have doubled as sliding ramps for counterweights. Whatever the exact method, the common thread is doing many things at once so the average holds.

What we still don’t know

The rate calculation, honestly, is the easy part. You can do it on the back of an envelope, and every serious source lands in roughly the same range.

What none of the math answers is the harder question underneath it: how a single human organization, with no machinery and no written management theory we’d recognize, held that cadence for the better part of a generation.

Consider what the pace assumes. Quarries feeding the site without running dry. Boats arriving on schedule. Ramps maintained. Thousands of workers fed, housed, rotated, and replaced as they tired or died, all without the whole tempo collapsing when any one link failed for a season. Merer’s journal gives a single thread of that operation for a few months of one year. The rest is guesswork. I find it hard to believe we’ll ever fully reconstruct the day-to-day of it, and the papyri, for all they reveal, mostly sharpen the question rather than answer it.

So the number that stops you cold turns out to be the part we understand best. Set a block every few minutes for twenty years, and the strain isn’t on any one back. It’s on the organization that had to keep that rhythm going, on schedule, in the sun, for two decades, while the thing it was building slowly blotted out the horizon.

The post The Great Pyramid was raised from an estimated 2.3 million stone blocks in roughly 20 years — which works out to setting a block, some weighing several tonnes, about once every few minutes of daylight for two decades appeared first on Space Daily.

Picture someone leaving their apartment on a hillside above the water, coffee in hand, stepping onto a train. Four minutes later they get off in a different continent. No passport, no fuss, no sense of having crossed anything at all. They do it again on the way home.

For a lot of people in Istanbul, this is just the shape of an ordinary working day.

It sounds like a geography quiz answer, and it is one. You can hop from Asia to Europe before your coffee cools.

What does that tell us about the lines we draw on maps?

The city that broke the map

Istanbul is by far the largest city in the world shared by two continents, Europe and Asia. There are other transcontinental cities, including Atyrau and Suez, but none come close to Istanbul’s scale. This is a city of roughly 15 million people, and the continental boundary runs right through it.

The split is not even. Istanbul’s population reached 15,701,602 at the end of 2024, according to the Turkish Statistical Institute, and the two sides carry very different loads. Roughly 65% of residents live on the European side, and 35% on the Asian side. Most of the shops and offices sit in Europe, and many jobs remain concentrated there. Much of the more affordable housing has grown up in Asia. You can probably already see where the daily traffic comes from.

What the Bosphorus actually is

The thing doing the dividing is the Bosphorus, a narrow channel of water about 31 km long that links the Black Sea to the Sea of Marmara and runs entirely inside Turkey. It is water, but it is also a border. This strip of sea is treated as part of the accepted line between Europe and Asia, which is why crossing it counts as changing continents.

Until the first Bosphorus bridge opened in 1973, travelling by boat was the only direct way across, and that history still shapes the city’s rhythm. Ferries are woven into daily life in a way that’s hard to picture from the outside.

As Adil Bali, an expert on the history of Istanbul’s ferries, puts it, “It is one of the few cities in the world that can be crossed by sea, so the ferries are indispensable here.” That’s a romantic framing, but the point holds: those city ferries still carry at least 40 million passengers a year.

The commute that crosses a continent

Ferries are the old way. The Marmaray rail line runs through a tunnel beneath the strait, and its trains make the crossing in about four minutes. Not a scenic voyage between continents. Just four minutes of a normal train ride, mostly in the dark.

The scale is what gets me. Marmaray carries between 600,000 and more than 700,000 passengers a day, and in 2024 it set a single-day record of 743,596 riders. A report from the Council of Europe Development Bank describes how the tunnel changed the trip, lifting capacity to up to 75,000 passengers per hour in each direction, up from around 10,000 before. 

So the intercontinental commute is not a novelty. It’s the plain logistics of getting to work for hundreds of thousands of people, most of whom, I’d guess, think about it about as much as anyone thinks about their morning train, which is to say not at all.

Why this matters beyond the geography trivia

Here is what I keep circling back to. If millions of people can cross between Europe and Asia without noticing, maybe the noticing was always the strange part, not the crossing.

Geographers have made this point for a long time: the boundary between Europe and Asia is debated, not a simple fact of geology. There is no ocean between them, no crack in the Earth’s crust, nothing underfoot that says “you are now leaving one continent.” It’s a single connected landmass, Eurasia, with a line drawn across it by historical and geographic convention rather than by a clean geological break. The Bosphorus got picked as part of that line, which is convenient and tidy and completely human-made.

Istanbul is where that idea meets a commuter train timetable. The city doesn’t disprove continents so much as show how soft the concept is once you stand on top of it. A person eating breakfast in Asia and clocking in in Europe an hour later isn’t doing anything out of the ordinary. They’re just moving through a city that happens to sit on a line somebody else decided mattered.

The continents are an agreement, not a discovery. Istanbul is the place where you can ride straight through the seam and feel nothing change, because there was never really anything there to change.

The post Istanbul is the only major city on Earth that sits in two continents at once. The Bosphorus strait cuts straight through it, so one half of this metropolis of some 15 million stands in Europe and the other in Asia — meaning millions of residents cross between two continents on their daily commute, hopping from Asia to Europe and back just to get to work appeared first on Space Daily.

How many times do you check your email on a normal workday? Be honest. Not the number you’d like to say, the real one, counting every quick glance at the phone and every tab you flick back to between actual tasks.

Some research suggests this little habit might have an effect on wellbeing and stress. 

A quick note before we go further: I’m a writer, not a psychologist or a clinician, and what follows is me reading and thinking about one study, not handing out advice. The research here is drawn from a particular group of people, so treat it as a useful clue about how attention and stress interact, not a rule about your life.

In 2014, Kostadin Kushlev, then a PhD candidate, and Elizabeth Dunn at the University of British Columbia ran a two-week field experiment to test something simple. Does checking email less often make you feel better? They published it the following year in Computers in Human Behavior as “Checking email less frequently reduces stress.”

They recruited 124 adults, about two-thirds of them students, the rest a mix of financial analysts, medical professionals and others. Over two weeks, each person spent one week checking email as often as they liked, and another week limited to three times a day. Which week came first was decided at random. So everyone was their own comparison, living both ways.

You might expect the finding to be about getting more done. Fewer interruptions, more output, that sort of thing. That isn’t what they measured, and it isn’t what jumped out.

What they found was that people felt calmer during the limited week. Participants reported significantly lower daily stress when they were checking less, and lower stress in turn predicted higher well-being across a range of measures. Kushlev put it as plainly as it can be put. “Our findings showed that people felt less stressed when they checked their email less often.”

It’s one two-week study of 124 mostly young people, so it’s a clue rather than a verdict, but the mechanism it points to has shown up in other workplace research too.

The stress relief didn’t come from clearing the inbox faster or replying the moment something landed. It came from checking less often, full stop. The authors point at attention fragmentation, the cost of constantly breaking off what you’re doing to glance at something else, not the speed of your replies.

I know that cost intimately, because I lose to it most days. A Slack message comes in while I’m writing. I tell myself I’ll just glance. I glance, I answer, I come back to the document, and then I sit there for a while staring at the half-finished sentence, trying to remember where I was going with it. The message took ten seconds. Getting back into the writing takes a lot longer.

I’ve built a small fortress against this, with mixed success. The phone goes in another room. I close every tab before I start. No social media open while I work. None of it makes me disciplined. The systems leak, I break my own rules, and some mornings the fortress is more of a fence. But the principle holds: the cost is the interruption itself, not whether the email was urgent.

There’s a wrinkle that makes the study more honest, not less. The people in the limited week mostly couldn’t actually hit three times a day. They checked a mean of about 4.7 times, well above the target, against a baseline of about 15 checks on a normal workday. Kushlev was upfront about it: “Most participants in our study found it quite difficult to check their email only a few times a day.”

So the lower stress showed up in people who tried and largely fell short. That’s encouraging, because most of us are going to fall short too. You don’t have to be a monk about it. Cutting from fifteen-odd checks toward five seems to do something, even if three stays out of reach. As Kushlev framed it, drawing on his own study, “people find it difficult to resist the temptation of checking email, and yet resisting this temptation reduces their stress.”

Kushlev says he changed his own habit after the study. He now checks email in chunks several times a day, rather than constantly responding to messages as they arrive. That’s the one lever from all of this I’ve actually pulled, and the one I plan on keeping — not three times a day, just in chunks, with the inbox shut in between, getting back to whatever I was supposed to be doing before the next glance.

If the low hum of being always-on has tipped into something heavier than email annoyance, a chat with a qualified therapist is worth far more than anything I can offer here.

The post Researchers had 124 adults cut their email checking to three times a day — what dropped wasn’t their workload, it was their daily stress appeared first on Space Daily.

Imagine your flight is delayed three hours. Or someone leaves you a bad review that you think is unfair. Or a person you live with wakes up in a foul mood and you can feel it filling the kitchen.

The first reflex, at least mine, is to push back against the thing. To argue with the airline, draft the reply, try to fix the mood. To treat the situation as a problem I can solve if I just apply enough force.

I started reading Stoicism in earnest during a period of failure and a general search for meaning. Seneca’s line about how we waste time stayed with me as a durable impression from that whole reading rabbit-hole.

But the idea I keep coming back to, the one that has been most useful, is the one Epictetus opens his Enchiridion with:

“Some things are in our control and others not. Things in our control are opinion, pursuit, desire, aversion, and, in a word, whatever are our own actions. Things not in our control are body, property, reputation, command, and, in one word, whatever are not our own actions”. 

The handbook was compiled by his pupil Arrian from Epictetus’s teaching, but the thought is his, and modern readers tend to call it the dichotomy of control.

A note before I go further. I’m not a psychologist or a philosopher by training, just a reader who came to the Stoics during a rough stretch and kept reading. What follows is reflection on old ideas and a little modern research, not advice, and the psychology I mention is observational, drawn from particular groups of people rather than rules about you.

The easy misreading is to hear “big things versus small things,” as if Epictetus is telling you to sweat the little stuff and let the big stuff go. I don’t think that is the cut he’s making. The cut is between what is your own doing and what is not. Your judgments, your choices, your effort, your intentions sit on one side. Your body, your property, your reputation, your job title, the outcome of almost anything — all of that sits on the other.

The slightly uncomfortable part is how short the first list turns out to be once you’re strict about it. Almost everything I would naturally call “mine,” the result of my work, what people think of me, whether a plan succeeds, is not actually in my power. As the professor of philosophy, Massimo Pigliucci puts it, the idea “basically reminds us that our agency, our ability to change things, is far more limited than we normally think.” 

Years ago I tried to build a coffee business. It failed. And the part I didn’t understand until afterward was that the outcome was never really mine to control. Whether the business survived depended on the market, on timing, on a hundred things I couldn’t move no matter how hard I pushed. What was actually mine was the effort, the decisions, the work I put in each day. Those I could give fully.

The first time around I got this exactly backwards. I poured my anxiety into the outcome, the part I couldn’t touch, and the fear of failing followed me everywhere. When the thing I’d been dreading finally happened, the strange discovery was that the reality was lighter than the fear had been. Fearing it was worse than living it. I’m not romanticizing this, and I’m certainly not recommending failure as a teacher. But the dichotomy was sitting right there in the experience. The effort was mine. The result never was. Carrying the result as though it were mine just doubled the weight.

None of this is permission to stop caring or go limp. That’s the version of Stoicism that gets it wrong, the one that treats “let it go” as an excuse to do nothing. Epictetus is not saying don’t try. He’s saying try completely on the part that is yours, then release your grip on the part that isn’t. You act fully, then you stop demanding a particular result from the universe as the price of your peace.

So the freedom here is not the obvious kind. It isn’t getting more control over outcomes, more grip on the delayed flight or the bad review or the mood in the next room. It’s noticing, in the moment, which part of the thing is actually your own doing, giving that part everything, and setting down the rest.

These days, when a result I wanted slips away from me, I try to ask one plain question before I start fighting it: was this ever mine to decide? Often the answer is no. And there’s a real lightness in putting down a thing you were never holding up in the first place.

If any of this is landing closer to home than it is interesting, a good therapist or counsellor is worth far more than any old book or article, mine included.

The post Thought of the day from Stoic philosopher Epictetus: “Some things are in our control and others not. Things in our control are opinion, pursuit, desire, aversion, and, in a word, whatever are our own actions. Things not in our control are body, property, reputation, command, and, in one word, whatever are not our own actions” appeared first on Space Daily.

Can one question really tell you how a whole life is going? It sounds too simple. A life has work in it, and health, and the people you love, and the quiet sense of whether any of it means anything. Reducing all of that to a single number on a scale feels like measuring an ocean with a teaspoon.

And yet that is more or less what a group of wellbeing researchers argued in earlier this year. In a short reply published in Nature Human Behaviour, the editors of the World Happiness Report made the case that individual wellbeing is best captured “by single self-reports of one’s overall quality of life.” One question, asked directly. That’s the whole proposal.

A quick note before going further. I am not a psychologist, an economist, or a wellbeing researcher of any kind, so take what follows as one curious reader’s reading of a scholarly debate, not advice. The work here is observational social science, and a population-level pattern is never a verdict on how your own life is going.

The case for measuring everything

The argument the 2026 reply is pushing back against has obvious appeal. In 2025, Harvard’s Tyler J. VanderWeele and Baylor’s Byron R. Johnson published early results from the Global Flourishing Study, a survey of more than 200,000 people across 22 countries. Rather than asking one question, they built a composite index across five domains: happiness and life satisfaction, physical and mental health, meaning and purpose, character and virtue, and close social relationships.

You can see why. A person could be financially comfortable and lonely, or healthy and adrift. Stitch the domains together and you get a fuller picture. VanderWeele draws a distinction here between two ideas, and he is careful to hedge it. Wellbeing, he suggests, “might be viewed as all aspects of a person’s life are good as they pertain to that individual, whereas flourishing is all aspects of a person’s life are good, including the context and communities and environments in which that person lives.”

The composite view runs into a problem, though, and I have felt it personally. Ticking the boxes does not reliably move the overall sense of how life is going. 

What the single-item camp actually argues

So the counter-argument is not “wellbeing is simple.” It is closer to this: most of what gets bundled into a flourishing index is not wellbeing, it is the stuff that produces wellbeing. The 2026 authors put it carefully, with the hedge intact. In their view, “most of the individual factors that get combined in such an index are causes of wellbeing and not wellbeing itself.”

Health, money, relationships: on this reading, those are inputs. Ask about them and you are measuring the recipe, not the meal. Ask a person to rate their overall life, and the editors argue, “the resulting product is wellbeing, in other words, the quality of life as we experience it.” The person has already done the weighting in their head. They know how much the lonely-but-comfortable trade actually costs them, in a way no fixed formula across 200,000 strangers can.

This is not a fringe idea dreamed up to win an argument. It is how the global rankings already work. The World Happiness Report’s country ordering rests on a single life evaluation question, the Cantril ladder, which asks people to place their life on a 0 to 10 ladder. Gallup asks it of people in more than 140 countries.

Here is that question: 

“Please imagine a ladder with steps numbered from 0 at the bottom to 10 at the top. The top of the ladder represents the best possible life for you and the bottom of the ladder represents the worst possible life for you. On which step of the ladder would you say you personally feel you stand at this time?”

Closing thoughts

The single question dares to remove almost everything and trust the person to have done the math. There is something honest in that, and something that could go wrong.

But a tidy number can flatter or deceive. A bad week can drag it down; a sunny afternoon can lift it past what you’d say on reflection.

One ordinary evening I tried it on myself. Zero to ten, how good is your life, overall. I landed on a number quickly, which surprised me, and then immediately distrusted it, which surprised me less. The honest answer wasn’t the number. It was the half-minute of weighing that produced it, the things I added in and the things I quietly let go. The number was just where the weighing stopped. Maybe that is the whole point, and maybe it is the catch: the single question doesn’t simplify the life, it just forces you to do the arithmetic.

If any of this is landing closer to home than it is interesting, talking to a good therapist is worth far more than reading this article.

The post In 2026, wellbeing researchers suggested that simply asking people one question about how good their life is overall may be the clearest and most comparable way to measure wellbeing around the world appeared first on Space Daily.

Most lunch breaks are not really breaks. A sandwich at the desk, the screen never quite off, an eye on the next message. The afternoon arrives already flat, and you spend it pushing a boulder that did not feel this heavy at ten in the morning. I suspect a lot of us know that particular afternoon flatness without ever connecting it to how we spent the forty minutes before it.

A small Finnish study made me think about that connection more carefully.

I am not a psychologist or any kind of clinician, so take this as one curious reader’s reading of one piece of research, not advice about what your body or your workday should do. What follows is a single intervention study with a modest number of people, and the findings are from a particular group, not settled laws about everyone.

What the study actually did

Organizational psychologist Marjaana Sianoja and colleagues asked Finnish knowledge workers to do something simple during their lunch breaks. One group took a slow 15-minute park walk; a comparison group did 15 minutes of relaxation exercises. They kept it up for 10 consecutive working days, and reported on their afternoon concentration, strain, and fatigue along the way. The park walk group had 51 people, the relaxation group 46.

The headline finding is the kind you might expect. The authors reported that “park walks at lunchtime were related to better concentration and less fatigue in the afternoon through enjoyment.” Fifteen minutes among trees, and the afternoon went a little better.

The part that surprised me

The interesting word in that finding is the last one. Through enjoyment.

That reorders things in my head. We tend to treat the activity as the active ingredient, as if a walk is a pill you swallow whether or not you taste it. The study suggests the enjoyment is doing a lot of the quiet work, and the walk is mostly a reliable way to produce some.

A separate line of research points the same direction. In an experience-sampling study, John Trougakos and colleagues found that the restorative value of a lunch break depends heavily on how freely it was chosen.

Why the distinction matters to me

This is where it stops being abstract. My weekday afternoons run from two different cafés, with a walk between blocks. When a sub-task is done, I pack up and move to the second café, and the walk in between is the seam. I did not start doing this for any measured productivity reason. I do it because moving lets the last task drain out of my head before the next one starts, and switching the room seems to switch something in me too.

What I notice is that I look forward to that walk. It is not a chore I have inserted to be virtuous. If someone scheduled it for me, made it mandatory, told me to log it, I think it would quietly stop working. The mechanism in the study and the reason my own version holds up seem to be the same one: the walk is the vehicle, the wanting-to-do-it is the engine.

The honest limits, and what I take from it

It is worth keeping the size of all this in proportion. Research from the same program found that lunch break activities did increase restoration and reduce fatigue, but the authors were candid that the effects seem weak, short-lived, and dependent on the season. Fifteen minutes in a park is probably not going to fix a job that grinds you down, and it was never going to.

What I take from it is smaller and more usable than a fix. Protect the break, and make it one you genuinely want. For me the strongest version of this has nothing to do with work at all: when I am home in Ireland, I walk alone with no music or podcast, and it is the closest thing I have to a practice. I tried meditation and it never stuck. The quiet walk, and solo golf, are my equivalent, and I think the reason they last is the same reason the study points at. I am not enduring them. I like them.

A break taken and a break enjoyed are not the same break. You can do all fifteen minutes, hit every step, and come back no lighter than you left. The walk gets the credit, but perhaps the enjoyment is what is actually carrying the load.

If  flat afternoons are part of something heavier than a dull lunch break, the kind of fatigue that does not lift, a good counsellor or therapist is worth more than any walk or any artic

The post Over ten workdays, researchers sent employees on 15-minute lunchtime walks through a park, and afternoons changed — sharper concentration, less fatigue, with much of the lift carried by how genuinely people enjoyed the walk. appeared first on Space Daily.

For years I believed burnout was a simple equation. Too many hours in, not enough rest out, and eventually you hit the wall. It is a tidy theory, and in my experience mostly wrong.

The worst stretch I have ever had was not in finance. It came later, when I was running my own businesses, an online school. I felt hollowed out and a bit hopeless. I want to be honest about that: I was never formally diagnosed with anything, so I am not claiming a clinical label. But the feeling was real, and it did not track neatly with how busy I was. Some of my busiest weeks felt fine, while some of my lighter ones were unbearable.

Quick note before we go further. I am not a psychologist or a doctor, and nothing here is treatment advice. This is one writer reading the research and reflecting on it. The work I am leaning on is from a particular research team and describes patterns across groups of people, not a rule that fits every reader or every job.

Research helped me make sense of my own experience. Psychologists Christina Maslach and Michael Leiter argue that burnout has as much to do with job conditions as with personal factors, and that when there is a mismatch between a person and their job, the risk of burnout goes up. Their framework, sometimes called the areas of worklife model, points to six areas where fit can break down: workload, control, reward, community, fairness and values.

Here is what each one looks like up close.

1. Workload

This is the one we all reach for first, and it does matter. But the problem is rarely volume on its own. It is overload without recovery, or the wrong kind of demand arriving with too few resources to meet it.

Maslach and Leiter describe work overload as when “the job demands are too many, the hours are too long, and the resources to handle them are too few.”

Notice the third part. Two hard weeks with a good team and a clear finish line can feel energising, while two easy weeks with no support and no end in sight can flatten you.

2. Control

Having work to do is one thing; having no real say over how it gets done is another, and it may be the heavier load. Maslach and Leiter suggest a lack of control “is often a more serious issue for workers than workload per se.”

Their case for why is simple. “With the capacity to participate in decisions or to make choices, people can adjust” — without that capacity, even a reasonable workload starts to grind.

3. Reward

Reward is money, yes, but it is also recognition, the sense that the effort registered with someone. When you pour yourself into work and it disappears into a void, something quietly corrodes.

When I managed an adult language school, I learned you cannot manufacture engagement with perks or pep talks. The pizza Fridays and the motivational emails landed flat when the underlying work and the person did not fit.

Engagement showed up when people felt their effort actually counted for something, and no amount of catering could fake that.

4. Community

Work is a social place, and when the social fabric frays, it shows. Chronic conflict, isolation, a manager who plays favorites, a team that has stopped trusting each other.

Maslach and Leiter are blunt about one corrosive ingredient, writing that “Disrespectful behavior has no benefits at work.” A good community carries you through a brutal stretch; a poisoned one makes an easy job feel heavy.

5. Fairness

Fairness is the area people often cannot name but feel acutely. Decisions get made behind closed doors, or promotions follow politics rather than work, or two people end up held to different standards on the same behaviour.

The sting is not so much the unfair outcome itself as what it signals about whether you are seen and valued at all. Once you start reading the workplace as rigged, almost everything else gets harder to swallow.

6. Values

This is the gap between what you believe matters and what the job actually asks of you, day after day. It is the quietest of the six and, for me, the decisive one.

I left finance because the shape of the job was the problem, not the hours. No amount of yoga, kale or ten thousand daily steps was going to change that shape.

That was right for me and might well be a bad call for someone else. Plenty of people thrive in exactly the work I walked away from. The values mismatch is personal by definition, about the fit between this person and this job, not a verdict on the job itself.

Burnout as a fit problem

What changed for me was the reframe. Maslach and Leiter describe burnout not as a personal failing or a stamina deficit, but as a mismatch between the job and the person. And the mismatches stack. As Maslach put it in a 2018 talk, “The more the mismatches you have, the more likely we are to see a risk of burnout down the road, a year later, or two years later.”

Keep in mind that this is one influential model rather than the final word on burnout, but it is a useful lens.

The practical value of the six areas is that they give you something more precise to ask than “am I doing too much?” You can ask which one is actually off. Is it the workload, or is it that nobody noticed the workload? Is it the hours, or is it that the hours go toward something you no longer believe in? Naming the specific mismatch is more useful than the blanket prescription to do less, because doing less solves nothing for a values gap or a fairness problem.

If any of this is landing closer to home than it is interesting, talking to a qualified therapist or counsellor is worth far more than any article. There is no prize for white-knuckling through it alone.

The post We tend to blame burnout on simply doing too much, but some researchers argue it grows from six quieter mismatches — workload, control, reward, community, fairness and values — between a person and the job appeared first on Space Daily.

I am not a psychologist or a therapist, and what follows is one writer reading Jung and a bit of modern research, not advice.

For most of my twenties I looked outside. There was a script, the one a lot of us absorb without noticing, where by thirty you are supposed to have the markers. Money, the right lifestyle, the proof that you have arrived.

I chased a fair bit of it.

I got the motorbike I had told myself I wanted for years, for instance. And the unglamorous truth: within a few months the bike was just my bike. The wanting did most of the work, and the having did almost none.

For me, this is the half of Jung’s line about dreaming. Looking outside, you are forever projecting the good feeling onto the next thing, and the next thing keeps arriving and going flat.

The modern research rhymes with this in a way I find hard to ignore. In a 1993 study, Tim Kasser and Richard Ryan found that people who placed relatively high importance on financial success relative to goals like self-acceptance and community tended to report lower wellbeing. A later meta-analysis by Helga Dittmar and colleagues pulled decades of this work together and found a strong focus on money and possessions sitting alongside lower personal wellbeing.

None of that proves the new bike made me unhappy. It didn’t. But the wanting-then-flattening cycle is real, and I had lived it before I read a single study about it.

Looking inside, and what Jung actually meant

The line itself is older and gentler than the self-help version of it suggests. Jung wrote it in a letter dated 22 October 1916, to a patient. It appears on page 33 of the first volume of his collected letters. In the passage Jung tells her that her vision will only clear when she can look into her own heart, and that as long as she keeps projecting her psychology onto other people she will never reach peace with herself.

That is the part I think people miss. The inward turn here is not navel-gazing. It is the opposite. It is pulling back the projections you have flung onto the world and the people in it, and seeing more clearly because of it. Waking, in Jung’s sense, is just looking at what is actually there instead of the dream you laid over the top of it.

The pivot Jung named in the middle of a life

Jung had a bigger frame around all this, the idea he called individuation. Put simply, he thought a life has two movements. The first half is outward: you build an ego, a career, a place in the world. The second half turns inward, toward wholeness and meaning. The Jungian analyst Murray Stein describes it this way: “The first half of life is dedicated to ego development; the second half of life is aimed at integration of the whole psyche to the degree possible in a given human life.” In his account the first-half personality is roughly in place by the mid-thirties, before the inward turn begins. Stein is careful to add that full individuation is never quite reached, and it is worth holding onto that. Keep in mind also, that this is a Jungian framework, a way of making sense of a life, not a settled law of human development.

I bring it up because I seem to be living the pivot in real time, and it has caught me off guard. I am thirty-five. I used to be allergic to stability. Now I genuinely want a quiet, ordinary life. I want to be back into my fitness. I have a leather workbench I never get to enough. Mostly I want less, not more, which is not the wanting I grew up with at all. I am not claiming any of this as expertise. I am just a generalist who read some Jung and felt seen.

What the inward turn looks like in an unglamorous week

The honest version of looking inside is not dramatic. It is not a retreat in the mountains. For me it is wanting less, an ordinary week with nothing to photograph, a walk with no podcast in my ears. I am not a meditator. These are my quieter equivalents, and most of them are small enough to sound like nothing.

One thing I want to be straight about: the inward look can surface things that are heavier than an article like this is built for. Jung’s letter was, after all, written to a grieving woman in treatment, not to someone tidying up their hobbies.

If turning inward stirs up grief, or a low that won’t lift, a qualified counsellor or therapist is worth more than any line of philosophy, mine or Jung’s.

The post Thought of the day from Carl Jung: “Who looks outside, dreams; who looks inside, awakes” appeared first on Space Daily.

Most days I leave my place around 1pm and go to lunch, usually alone. It is the seam in my working day, the bit between the morning at my desk and the afternoon spent moving between coffee shops.

For a long time I thought of it as unremarkable. Fuel, a break, nothing worth noticing. So I was a little thrown to read that this small thing, how you sit down to eat, can affect your wellbeing to a similar extent as your income or whether you have a job.

I am not a psychologist or a researcher, and what follows is one curious reader’s take on the findings, not advice about your life. The studies here are patterns across large groups of people, not rules about you, and the headline relationship is correlational, which matters more than it sounds.

The team who created the World Happiness Report 2025 using  noted that, “Sharing meals proves to be an exceptionally strong indicator of subjective wellbeing – on par with income and unemployment.”

What stuck with me is that it is the meal specifically, not just time around other humans. You can sit beside someone on a train for an hour and arrive a stranger. A meal is different. There is a shape to it, a beginning and an end, a reason to stay put and face each other for a while. The report found the largest jump in how people rated their lives sat between those who ate every meal alone and those who shared even one. Not the difference between one and seven. The difference between zero and one.

That detail reframes the whole thing for me. The bar is not some idealised long table of friends and candles. It is one meal, with one other person, where you are both actually there. 

The shared meal is easy to lose without ever deciding to lose it. The companion study, drawing on the American Time Use Survey, found Americans dining alone more and more, up by more than half since 2003, with younger people leading the trend. By 2023 roughly one in four Americans reported eating all of the previous day’s meals on their own. Kaats, one of the co-authors, said of the rise, “It’s just surprising to me that this increase would be so clear and so severe.”

I recognise the slide. My lunch out is a real fixture, but going out alone is not the same as eating with someone, and most days I eat alone. There is also the simple matter of having people to share a meal with in the first place. When I first moved to Vietnam there was a big group every week. Five years in, the number of friends I would actually sit down to eat with had shrunk to about five. The mobile expat life does that. People rotate out, and the table gets quieter without any single moment you could point to and call the change. The shared meal does not get cancelled. It just stops happening.

I do not want to turn this into something to optimise between calls. That would miss the point entirely. What I am taking is smaller and duller and probably more useful for being so. Eat lunch away from the screen. Eat it with another person when I can, and not always the same one. Treat the seam in the day as something worth protecting rather than the bit to compress when the morning runs long.

None of this needs a system. It needs me to text someone the night before. That is about the size of it.

If anything in this article feels distressing, a good counsellor will do more for you than anything I can write here. 

The post Researchers found that people who often share meals with others tend to report greater wellbeing, a link about as strong as income or having a job appeared first on Space Daily.

Picture the version of your life where the work just stops. No inbox, no calendar, no one waiting on you for anything. Days that are yours from the moment you wake. Most of us carry some version of that fantasy around, and the assumption baked into it is simple: more free time would make us happier.

But is that actually true?

I am a curious generalist, not a psychologist, and what follows is reading and reflection on one study, not advice. The research here is observational at its core, drawn from particular groups of people at particular times, so it describes patterns across a population rather than rules for your specific life.

What the numbers actually say

In 2021, three researchers, Marissa Sharif at Wharton along with Cassie Mogilner Holmes and Hal Hershfield at UCLA Anderson, went looking for an answer in a lot of data. Their paper in the Journal of Personality and Social Psychology drew on survey responses from 35,375 Americans, pulled from two large datasets, plus their own experiments.

What they found was not a straight line up. Well-being rose as people got more daily free time, but it leveled off after about two hours and started to decline after five. Plot it and you get an inverted U: a curve that climbs, flattens, then sags. The sweet spot sits somewhere in that two-to-five-hour band.

So the answer to the desert-island fantasy is more complicated than the fantasy wants it to be. As Mogilner Holmes put it, “To that initial question, shall we quit everything and go live on a desert island, the answer is no. We would not be any happier.”

Why the floor exists

The bottom end of the curve is the easy one to understand, because most of us have lived it. When the day is crammed and there is no slack in it, the small pleasures stop landing. You eat lunch standing up. You answer one more message instead of stepping outside. The researchers found that a dearth of discretionary hours in a day “results in greater stress and lower subjective well-being,” as Sharif described it.

This is the well-supported end of the finding. Too little time hurts, and the fix is modest. Two hours a day is roughly where the time-stress starts to ease, which is a long way short of quitting your job and moving to a beach.

Why the ceiling exists

The top end is the more surprising part, and it is where the study gets careful. Sharif’s own framing is that “while too little time is bad, having more time is not always better.” Note the “not always.” The drop at the high end was not the hours themselves doing the damage.

What the research suggests is doing the damage is something quieter. Past a certain point, Sharif argued, “a moderate amount of discretionary time leads people to be better off or happier compared to having a large amount of free time. And that’s because with a large amount of free time, people feel this lacking sense of productivity and purpose.”

The high-end drop was not fixed, though. When people spent the extra hours with others, or in ways they found meaningful, the dip softened. Mogilner Holmes offered the broad version of why: “We, as humans, don’t like to be idle.” Most people tend not to sit well with empty hours that have nothing pointing through them.

What I would actually do with a five-hour day

I tried the thought experiment on myself, honestly, and the result was instructive. If you handed me five free hours a day, I could fill some of them without thinking. Golf, for one. Time outdoors. The leatherwork I keep meaning to get back to and never quite reach.

But after that the answer goes blank, and the blank is the part that interested me. I genuinely do not know what I would do if I stopped working. Play golf, I guess. I like a week off for the golf as much as anyone, but I can feel how more than that starts to work against me rather than for me. I can see how people drift into feeling purposeless when the structure falls away. The curve the researchers drew is not abstract to me; it is the shape of my own honest answer.

The number that matters isn’t the hours

Perhaps the reframe worth carrying out of all this is that the figure doing the work here is not really the count of free hours. It is what fills them. Sharif’s plainest line on the whole thing is that “the way people spend their discretionary time matters a lot.”

The blankness in my own answer told me more than the parts I could fill. It says something about how thoroughly work has colonized the shape of an ordinary day, to the point where a few of us would struggle to recognize a day without it. That is not a tragedy. But it is worth noticing, because the fantasy of endless free time quietly assumes we would know what to do with it, and I am not sure I would.

For me, the more useful thing is not the two-to-five-hour band, tidy as it is. It is that I have some homework to do on the blank hours, long before I ever get handed them.

If this question lands heavier than it is interesting, if the idea of a day without work opens onto something closer to dread than relief, that is worth taking to a good therapist rather than sitting with alone.

The post The ideal amount of leisure time might be less than you think; research suggests somewhere around two to five hours a day appeared first on Space Daily.

You hear the buzzer. Your team has won, and you are already living a little way into the future, certain this feeling will carry you through tomorrow and the day after. The win has set the weather for the week, and you can feel the glow of it stretching out ahead like a long warm afternoon.

Sound familiar?

I grew up around sport. Hurling, Gaelic football, rugby as a kid, and golf still, most weekends I can manage it. So I know that feeling from the inside, the way a result can seem, in the moment, like it genuinely matters to the shape of the days to come. What I did not know, until I started reading the psychology on this, is how badly we tend to misjudge how long that glow actually lasts.

I am a curious reader of this stuff, not a psychologist. What follows is one study and what I have taken from it, not advice about your own mind. The finding here comes from a particular group of people at a particular time, so treat it as a clue about how forecasting works, not a rule about you.

The clearest demonstration I have found is a 2000 study of American college football fans by Timothy Wilson, Thalia Wheatley, and colleagues, published in the Journal of Personality and Social Psychology.  Fans made their predictions first, in some cases forecasting how happy they would be after a win, and researchers then checked what their happiness actually did.

The gap between the two is what the study was after. As Wilson and Gilbert later put it in their review of this work, “college sports fans overestimated how happy they would be the day after their favorite team won a football game.” The fans predicted they would be above baseline right after the game and on each of the next days, but their level of happiness was no different just the day after the game.

The name the authors gave the mechanism is focalism. The idea is simple enough that I felt slightly caught out reading it. When we imagine one future event, we zoom in on it and quietly forget everything else that will also be filling those days. Wilson and Gilbert describe how “people tend to think of their lives in a vacuum, focusing on that occurrence alone.” The philosopher Wladyslaw Tatarkiewicz put the same thought more plainly decades earlier, in a line the authors quote: “In anticipating a coming event we have it alone in mind, and make no provision for other occurrences.”

The Sunday after the win still has the dishes in it, a deadline you forgot about, a friend who texts with their own bad news, the small ordinary traffic of being alive. None of it disappears because your team scored. The authors argue that “by neglecting to consider how much these other events will capture their attention and influence their emotions, people overestimate the impact of the focal event.” The win does not stop mattering; it simply has to share the day with everything else, and it loses that contest faster than we expect.

The part that stuck with me most is this. The researchers found a way to soften the error, and it was almost embarrassingly low-tech. Before some fans made their forecasts, they were asked to fill in a kind of prospective diary, estimating how many hours they would spend on a handful of ordinary upcoming activities: going to class, eating, studying, seeing friends. No lecture, no warning, just a nudge to picture the rest of the week. As Wilson and Gilbert report, “people in the diary condition predicted that the game would impact their happiness significantly less than did people in the control condition.”

The diary trick is one of the rare psychological tweaks that costs nothing and asks for no willpower. We don’t need to talk ourselves out of caring about the game — only to remember that Monday exists alongside it.

The more I sit with it, the less this feels like a story about football. We do the same with the holiday we are sure will fix everything, the promotion, the move, the argument we are dreading. Anticipated highs rarely lift us as long as we plan for them to, and anticipated lows often do not flatten us as long as we fear they will.

I am not sure there is a clean lesson in this. The small move I have taken from it is to try to let the rest of the week or month into the picture before I decide how a single thing is going to make me feel.

The post Researchers tracked football fans and found they tended to overestimate how long the result would affect their mood, though prompting them to consider other upcoming events softened the forecast appeared first on Space Daily.

A study I read recently has stuck with me. It found that the people who lean hardest on AI tools tend to score lowest on critical thinking, with the steepest gap among the young.

I use AI tools every day for parts of my own writing work, so this is not a doom blog about technology rotting our brains. It is more that I read the study, recognized something in my own habits, and wanted to think through what it actually says before deciding how worried to be.

I am not a psychologist or a cognitive scientist, and I am not credentialed in any of this. What follows is one writer reading the research and thinking aloud about it. The study at the center of this is observational, and a population-level pattern is not a verdict on you or on anyone in particular.

What the study actually found

The work comes from Michael Gerlich at SBS Swiss Business School, published in early 2025 in the journal Societies. He used a mixed-method design: a survey of 666  participants across a range of ages and education levels, plus 50 follow-up interviews to put some texture on the numbers.

The headline result is blunt. As Gerlich put it, “The findings reveal a strong negative correlation between frequent AI tool usage and critical thinking abilities, mediated by cognitive offloading.”

Before that sentence does too much work, the word that matters most is correlation. Gerlich is careful about this, and so should we be. He notes that “the study highlights correlations rather than direct causation, meaning that while AI usage and cognitive offloading are linked to reduced critical thinking, additional factors may also contribute to this relationship.”

The reverse direction is also possible: that people who already think less critically may simply reach for the tool more. The study cannot tell you which way the arrow points.

The cognitive offloading mechanism

Cognitive offloading is the habit of delegating a mental task to something outside your head, a calculator, a sticky note, a search bar, an AI. We have always done it. The question the study raises is what happens when the thing we offload to is good enough to do the whole job, not just hold the answer.

There is an experimental companion piece worth knowing about, though with heavier caveats. An MIT Media Lab study by Nataliya Kosmyna and colleagues had 54 people write essays in three conditions, using an AI assistant, a search engine, or nothing but their own heads, while measuring brain activity. The brain-only writers showed the strongest neural connectivity; the AI users the weakest, and they struggled to quote work they had just produced. The main sample is small, the follow-on crossover phase included only 18 participants. Treat it as a suggestive clue rather than proof. Even with those caveats, it points at the same intuition from a different angle: when the tool ends up doing most of the assembling, less of the assembling is being done by the writer.

The young show the sharpest effect

The age pattern is the part of the study that is most worrying. The youngest band, aged 17 to 25, used AI most and scored lowest on critical thinking, while those 46 and above used it least and scored highest. Higher education was protective across the board.

Gerlich’s reading of this is appropriately tentative, and I want to keep it that way. He suggests that “digital natives, who have grown up with AI-integrated technologies, might be more prone to cognitive offloading than older generations.” Note the hedges in his own sentence. The reading is softer than “young people are bad at thinking” — it is a researcher saying that people who never knew a world without these tools may lean on them more reflexively, simply because the tools were always there.

What to do with this

I don’t think the answer is to throw the tools away.

Gerlich himself lands on a balanced note: “AI tools are not inherently detrimental; rather, their impact depends on how they are used.” His own prescription, framed as his view rather than settled fact, is that “AI should complement cognitive engagement rather than replace it.”

That distinction is an important one. Whether AI extends my thinking or stands in for it has turned out to be the question that matters most in my own practice.

What I take from this is small and practical: notice which part of the task you are handing over. Outsourcing a lookup matters less than outsourcing the judgment about what the lookup means, and the second one is what I try to keep watch on.

None of this is a substitute for talking to someone qualified — a therapist or career counsellor, or a trusted person in your life — if the bigger questions here, about work, change, or where you stand, are weighing on you more than they are interesting you.

The post A 2025 study of over 600 people found a correlation between leaning on AI tools and weaker critical thinking, sharpest among the young appeared first on Space Daily.

Here is a number you may have run into without knowing where it came from: 150. It gets quoted in management books, on team-size pages, in articles about why your group chat feels too big. It traces back to Robin Dunbar, a British anthropologist and evolutionary psychologist, who proposed in the 1990s that humans can hold roughly that many stable relationships at once. He got there by an odd route, extrapolating from the correlation between neocortex size and group size in non-human primates, then doing the sum for us.

The headline number is the least interesting part. What actually lands, for me, is what sits inside it.

Quick note before we go further: I’m not a psychologist or a neuroscientist, and this piece is reading and reflection, not advice. Dunbar’s number is a contested theory, not a settled law, and the wellbeing findings here come from observational research about groups of people, which is not the same as a rule about you. Treat the layers as a useful lens, not a diagnosis.

The number everyone quotes, and what it actually means

150 is not a roster of close friends. It’s the outer edge, the most people you can keep a genuine, two-way relationship with at all. Dunbar’s framing is that “the key to the 150 and the layers within is that they’re reciprocated.” Both people know each other. Both keep the thread alive. A follower count is not a friend, and 1,500 names you’d recognise is probably not 150 people who’d recognise you back.

He also stresses that 150 is an average with a lot of slack around it. As Dunbar himself puts it, the number is “always about 150, although there is some individual variation” — driven by personality, sex, and circumstance. It’s a soft ceiling, not a hard cap.

The layers inside 150 are where it gets personal

Inside that 150 sit nested rings, each roughly three times larger than the one inside it: about 5, then 15, then 50, then 150. The really good friends number about five, with wider rings of roughly 15, then 50, then 150 meaningful contacts. The five are the shoulders to cry on. The fifteen are the ones you’d confide in. The fifty are the good friends you’d happily have round.

The lopsided bit is how much of you goes to the centre. Dubar reportedly note that around 60% of your social attention, your time and your emotional capital, goes to the innermost fifteen. That inner core, Dunbar argues, makes “a big difference to your sense of wellbeing” and your engagement with life in general.

The rebuttal: is Dunbar’s number even real?

It would be tidy to stop there, but the brain part of the theory has taken real fire. In 2021, a team at Stockholm University re-ran the primate data using modern statistical methods and updated brain data, and concluded that a cognitive limit on human group sizes cannot be derived this way.  Co-author Andreas Wartel said that “it is not possible to make an estimate for humans with any precision using available methods and data.”

His colleague Patrik Lindenfors put it more directly: “the theoretical foundation of Dunbar’s number is shaky.” A third co-author, Johan Lind, suggested that “our brain can be trained in having more social contacts.” That last point is an interpretive analogy rather than a demonstrated result, so hold it loosely. The methodological objection stands, though: deriving a precise cap on friendship from neocortex size is harder to justify than the clean number 150 makes it sound.

What the framework is actually useful for

Here’s where I’ve landed. The exact figure could be 150 or far lower or a wide smear in between, and the brain-size derivation may not survive the statisticians. None of that touches the part that’s useful, which is the shape rather than the number. Concentric rings, with most of your warmth going to a small centre, and that centre mattering more for how you feel than anything in the outer layers.

You can’t see your fifty thinning to five in real time. It happens at the speed of people quietly drifting, missed coffees, the friend who moved and the call you kept meaning to make. The framework’s gift is that it names the inner ring as the thing worth protecting, the ring that does the emotional work. 

If any of this is sitting closer to home than it is interesting, talking to a qualified counsellor or therapist is worth far more than any number on a page.

The post In the 1990s, anthropologist Robin Dunbar argued there’s a natural ceiling on friendship set by the size of the human brain — around 150 people we can hold a real relationship with appeared first on Space Daily.

There is a particular kind of flatness that comes from moving through the same loop of places, day after day. Home, the same desk, the same walk to the same shop, back home. Nothing is wrong, exactly. But the days start to feel laminated together, hard to tell apart in memory. You get to the weekend and struggle to recall what the middle of the week actually held, because it looked like everything around it.

There’s a finding from a few years ago that I keep turning over, because it lines up so closely with that low-grade flatness, and with its opposite.

I’m not a psychologist, and the study I’m about to describe is one observational study of a particular group of people, not a settled rule about how everyone’s mood works. It’s a clue, not a prescription. Keep that in mind as you read.

In 2020, a team published a paper in Nature Neuroscience that did something I find quietly clever. Rather than ask people to remember how varied their lives felt, they tracked it. They followed 122 people in New York City and Miami using the GPS in their phones, over three to four months, and every other day they sent a text asking people to rate how they felt, using words like happy, excited, strong, relaxed, and attentive.

What they found is the pattern above. On days people moved among more varied places, they tended to report more positive feeling. And the relationship ran both ways. As co-author Catherine Hartley put it, “if I feel better today, I’m likely to move around” and have more novel experiences the next day, and the reverse held as well. Feeling good nudged people out into the world, and getting out into the world nudged the feeling back up.

It’s worth being clear about what “varied places” actually means here. Reading this, it’s easy to picture travel, big novelty, the kind of trip you save up for. But that isn’t what the GPS was measuring. It was measuring the ordinary spread of a day. 

I notice this sort of pattern most clearly looking back on my first year living in Vietnam. Everything was new that year. The city, the noise, the food, the language, the version of myself I was becoming in the middle of it. That year felt enormous in retrospect, longer than most years since. I don’t want to flatten it into a happy postcard, because there was real loneliness in it too, visa stress, a lot of evenings alone. But the texture of that time was rich in a way that the laminated weeks are not, and the difference was variety. I was visiting new places and new experiences almost constantly, whether I wanted to or not.

That’s the dramatic end of the scale. The mundane end is the one I actually live now, and I arrived at it by accident. My weekday splits between home in the morning and two different coffee shops in the afternoon, with a walk between each block. I built that pattern to clear my head between tasks, not to manage my mood. The location variety is a byproduct. But it does rhyme with the study in a way I only noticed after reading it. My ordinary day already has a small amount of roaming baked into it, and the days I skip it, staying put from morning to night, are reliably the duller ones.

The study’s author Aaron Heller’s own reading of all this is broad. “New and varied experiences are broadly beneficial for the brain,” he told Inverse. That’s one researcher stating his interpretation confidently, and it’s worth holding it as his view rather than proven fact. But he also said something gentler that I think lands better. “Even if you may not tend towards exploring,” he noted, “there are probably benefits” to doing so anyway. The hedges are his, and they’re the right ones to keep.

The part that stays with me is the direction it can run. If feeling flat and staying put feed each other, the loop can run in the wrong direction just as easily as the right one. The worse a stretch feels, the less you go anywhere. The less you go anywhere, the more the days laminate, and the flatter the stretch feels. Nothing dramatic happens. The world just quietly shrinks to the size of the rooms you’re already in, and the shrinking is so gradual you don’t clock it as a cause.

Talking to a qualified counsellor or therapist is worth a great deal more than any study summary.

The post Researchers tracked 122 people for three months and found that on days they visited more varied places, they tended to report feeling a little more positive appeared first on Space Daily.