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Widespread Tropical Cyclones During the Late Paleozoic Ice Age

29 July 2026 at 14:26

A newly published study reports that tropical cyclones were far more common during the Late Paleozoic Ice Age than many climate reconstructions have suggested. Led by Yan, Macarewich, Jiang, and colleagues, the work appears in Nature Communications (2026) and reframes how Earth’s cold interval coexisted with warm-water storm systems.

The researchers investigated geological signatures linked to extreme marine events, combining stratigraphic evidence with climate-model constraints. Their goal was to distinguish ordinary seasonal variability from the kind of widespread, repeated disturbances that characterize tropical cyclone belts.

A key technical advance in the study is the integration of paleoclimate boundary conditions with storm-resolving dynamical reasoning. Instead of treating cyclone activity as a simple function of temperature alone, the team considered large-scale patterns that govern where warm oceans can persist long enough to power rotating storms.

The results point to an expanded region of conditions favorable for cyclogenesis. Even though the planet was globally in an ice-age mode, ocean–atmosphere coupling—driven by uneven heat storage, changing circulation, and shifting storm tracks—likely enabled tropical systems to form across parts of the tropics more frequently than expected.

The authors describe “widespread” activity, implying that cyclone impacts were not limited to rare episodes. This interpretation aligns with the idea that cooling did not fully suppress tropical cyclone energetics; rather, it altered the geography and intensity distribution of storm-prone environments.

Using the preserved sedimentary record, the study connects storm activity to repeated depositional pulses. Those pulses, they argue, reflect basin-scale disturbance rather than local weather anomalies, strengthening the case for frequent tropical cyclone events during this interval.

From a broader perspective, the findings have implications for how we understand resilience and feedbacks in past climates. If cyclones continued to thrive under ice-age background states, then tropical extremes may persist through major global reorganizations.

The study’s viral potential is clear: it challenges an intuitive narrative that “ice ages mean calm tropics,” and replaces it with a more nuanced picture in which warm-water dynamics and circulation shifts can sustain storminess despite global cooling.

Below are the details available from the provided text:

Subject of Research: Tropical cyclone activity during the Late Paleozoic Ice Age.

Article Title: Widespread tropical cyclone activity during the Late Paleozoic Ice Age.

Article References: Yan, Q., Macarewich, S., Jiang, N. et al. Widespread tropical cyclone activity during the Late Paleozoic Ice Age. Nat Commun (2026). https://doi.org/10.1038/s41467-026-75609-1

Image Credits: AI Generated

DOI: 10.1038/s41467-026-75609-1

1,000 Years Ago There Were Tens of Thousands of Languages in the World, Today Only 7,500 Remain: This Is What Happened

Today, humans speak or use signs in approximately 7,500 different languages. However, this figure, impressive as it may seem, represents only a snapshot of a constantly changing history, and questions about the evolution of linguistic diversity have remained among the most elusive for science for decades. How many languages existed before the appearance of written […]

John Bell and the most obscure journal in physics

22 July 2026 at 11:00

As I was strolling through Belfast’s Titanic Quarter last summer, I discovered with delight a road called Bell’s Theorem Crescent. It’s named in honour of the Belfast-born physicist John Bell, best known for his eponymous theorem. Despite not being as embedded in popular culture as Schrödinger’s cat, his theorem will certainly ring a bell (forgive the pun) with most physicists.

The story goes back to 1935 when Albert Einstein, Boris Podolsky and Nathan Rosen (EPR) came up with their now-famous thought experiment, which was designed to show that quantum mechanics was, as a description of nature, incomplete. In the EPR scenario, non-local influences can affect the measurement outcomes performed on spatially separated particles.

Given how odd that seemed, some physicists invoked what are known as “hidden variables” to get rid of these non-local correlations and restore local realism. It was in 1964, while working at the CERN particle-physics lab, that Bell showed that no local hidden-variable theory can be compatible with the predictions of quantum mechanics.

This result – Bell’s theorem – is something I was familiar with but I had paid little attention to where it had originally appeared. As I discovered, it was published in a paper called “On the Einstein Podolsky Rosen paradox” in the journal Physics (3 195) in 1964. Also known as Physics Physique Физика, this little-known publication existed only from 1964 to 1968. In fact, Bell’s theorem is the most important result published in it.

The journal was set up by two physicists at Bell Laboratories in the US – Bernd Matthias and future Nobel laureate Philip Anderson. According to A Mind Over Matter – Andrew Zangwill’s 2021 biography of Anderson – they were not too happy with conventional physics journals. “The referees,” Anderson said, “often did a bad job, the editors took too long to make decisions, and too much wrong physics got published.”

Those are complaints you’ll still hear in coffee breaks at most physics conferences today, and they prompted Matthias to contact the media magnate Robert Maxwell, who’d founded Oxford-based publishing house Pergamon Press. Maxwell had figured out that scientific publishing could be a very lucrative business so he helped the two physicists to set up the journal.

A publishing experiment

In their first editorial, Anderson and Matthias called Physics an “experimental journal”, which they hoped would solve the problem of there being “far more good physics written than any physicist can read”. Their solution was to pick only those papers worth the attention of all physicists, which the editors did by reviewing – then accepting or rejecting – every submission themselves. They even paid authors 10 cents a word if their paper appeared in print.

Anderson and Matthias admitted that many physicists had already written to them, criticizing their proposed selection model. They’d been told that their “judgements will be fallible”, that they might be “overimpressed by showiness”, and that they’d end up rejecting excellent work. In response, the pair promised to try their best, accepting they would make mistakes and that their “criteria will be, not better, but different”.

The journal’s criteria clearly succeeded, in that Anderson and Matthias identified the merits of Bell’s paper, which was far from mainstream

These criteria clearly succeeded, in that they identified the merits of Bell’s paper, which was far from mainstream. Keen to find out more about the events surrounding its publication, I contacted Zangwill, who had interviewed Anderson several times for his book. Zangwill shared the following quote, published here for the first time.

“One day,” Anderson recalled, “a paper came in from a guy neither of us had heard of – John Bell. It was about hidden variables in quantum mechanics. Bernd had no clue, but I accepted it with the hope that its publication would spell the death of Bohmian trajectory quantum mechanics. It’s a very famous paper today.”

In 1967 the quantum physicist John Clauser found Bell’s paper after stumbling upon Physics Physique Физика, attracted by its unusual title. Clauser, who shared the 2022 Nobel Prize in Physics, carried out the first Bell test in 1972 with Stuart Friedmann. Their work triggered a long series of experiments that would deepen our understanding of quantum mechanics and catalyse the development of quantum technologies.

Over its short life, Physics did publish work from other notable physicists including Murray Gell-Mann, Leonard Susskind and Leo Kadanoff. In fact, the journal was ahead of its time, with the model of in-house editorial selection for broad interest returning in the 2000s with the Nature series of journals. The inclusive, multi-language title was also well ahead of its day.

Sadly, Physics Physique Физика was discontinued in 1968 after just three volumes

Sadly, Physics Physique Физика was discontinued in 1968 after just three volumes. According to what Anderson told Zangwill, it stopped “not because it lacked submissions, but because they had promised contributors rapid publication and Maxwell kept increasing the time between the appearances of successive issues”. Maxwell’s aggressive pursuit of profit might also have played a role.

The journal has since been archived by the American Physical Society and is freely accessible online. One can only wonder what might have happened if Anderson and Matthias had picked a different name for their journal.

The post John Bell and the most obscure journal in physics appeared first on Physics World.

Study reveals the energy cost of Hannibal’s Alpine crossing

10 July 2026 at 14:30

It is one of the most extraordinary feats of military history – how the Carthaginian general Hannibal managed to cross the Alps with an army of 46,000 men, 7000 horses and 37 war elephants in 218 BCE.

Hannibal’s method was to catch the Romans by surprise by starting from what is present-day France and crossing the Alps into what is now northern Italy.

Yet the exact route that Hannibal’s army took remains a mystery and has been debated for decades given that no records by contemporary historians have survived.

Now theoretical ecologist Emilio Berti from the German Centre for Integrative Biodiversity Research Halle-Jena-Leipzig and Fritz Vollrath at the University of Oxford, UK, have calculated the metabolic cost that the army would have incurred via several possible mountain passes.

The route crossing Col du Clapier – passing first through Grenoble and Aiton before descending into the Po Valley – appeared to be the likely candidate, but recent analysis has suggested an alternative southerly route via the Col de la Traversette.

Using route modelling and elevation data, the team found that the Col du Clapier route would have required 6.28 × 1012 joules of energy, while Col de la Traversette, however, would have needed 5.42 × 1012 J.

Yet even on that route, the 15-day crossing would have required 230 tonnes of food and supplies.

The authors calculate that the army would still have lost about a fifth of their body fat reserves during the crossing, which explains the high mortality rate among men.

Yet on the Col de la Traversette route, the war elephants would have fared better, losing just 4% of their reserves. This may explain why some 30 elephants are estimated to have made it through to fight in the Battle of the Trebia – the first major battle of the Second Punic War.

“The new analysis does not eliminate all ambiguity, but it does strengthen the case for the Traversette route by demonstrating that it would better accommodate the demands of moving a large army that included elephants through extremely difficult alpine terrain,” notes Berti.

The post Study reveals the energy cost of Hannibal’s Alpine crossing appeared first on Physics World.

Recording the iPhone Screen With a Mac

24 July 2026 at 19:07

Marcin Wichary:

This instruction is a fever dream of three weird things in sequence:

  • What on earth is “QuickTime”?
  • I am recording with a player?
  • Why can’t I choose the option [“New Screen Recording”] that describes exactly what I want to do?

[…]

It’s noticing this kind of complexity, places where an easy way was chosen, design debt accumulated, and things got simply too weird. Apple allowed three weird things to accumulate here.

It makes sense in terms of the history and how the technology works, but from a clean slate one might expect this functionality to be in the Screenshot app, Screen Sharing, iPhone Mirroring, or perhaps even Finder.

Previously:

Scientists Are Turning Empty Roadsides Into Butterfly Habitats

Asclepius Humistrata SproutingThousands of native milkweeds are transforming North Florida roadsides into experimental pollinator corridors. Along rural two-lane highways in North Florida, newly installed signs now identify grassy roadside slopes as wildflower areas. At this time of year, the labels may seem unnecessary. Thousands of milkweed plants are already producing dense clusters of five-sided buds and open [...]

Siri Wolfram Alpha Defined the First AI Assistant

23 July 2026 at 22:54

Siri Wolfram Alpha integration helped create one of the defining moments in the early history of consumer artificial intelligence. When Apple introduced Siri with iPhone 4S in October 2011, users were not merely given another form of voice control. They could ask a spoken question and receive a calculated answer rather than a page of search results.

Questions involving mathematics, measurements, dates, nutrition, astronomy and factual comparisons could be routed to Wolfram Alpha, a computational knowledge engine launched in 2009. Siri handled the conversation, while Wolfram Alpha supplied structured information and calculations behind many of the responses.

The experience could feel remarkably advanced for its time. Asking how many days remained before a holiday, comparing the populations of two cities or converting miles into kilometers no longer required opening Safari, entering a query and selecting a website.

That direct path from natural language to a useful answer established an expectation that continues shaping AI products today.

Siri Began as an Action-Oriented Assistant

Siri did not begin inside Apple.

Its technological roots extend to research conducted at SRI International, including work associated with the DARPA-funded CALO project. The objective was to develop systems capable of learning, organizing information and helping people complete everyday tasks.

SRI later spun the technology into Siri Inc., founded by a team including Dag Kittlaus, Adam Cheyer and Tom Gruber. The company released a standalone Siri app for iPhone in early 2010.

The original product was designed around actions rather than ordinary web search. A user could ask for a restaurant reservation, request a taxi, check entertainment listings or search for local services. Siri attempted to understand the intent and connect the request with an appropriate online provider.

This approach was ambitious because the assistant needed to coordinate several different systems. Speech had to be converted into text, the request had to be interpreted, context had to be considered and an external service had to return something useful.

Apple acquired Siri in April 2010. Steve Jobs had personally recognized the potential of moving beyond a collection of apps toward a conversational layer capable of reaching them on behalf of the user.

When the assistant returned as an integrated feature of iPhone 4S, Apple had narrowed some aspects of the original startup vision while making the technology accessible to a much larger audience.

Siri could send messages, create reminders, place calls, manage calendar events, check weather conditions and answer questions. Apple initially labeled the feature as a beta, an unusual decision for a prominent part of a new iPhone launch.

The beta label acknowledged that natural-language interaction remained unpredictable. Accents, ambiguous phrasing, network conditions and external data providers could all influence whether a request succeeded.

A geometric, 3D red star with polygonal facets is centered on a solid red background, reminiscent of the sleek design language found in Apple Intelligence. The star is composed of interlocking shapes in varying shades of red.
Image Source: Google

Siri Wolfram Alpha Made Answers Feel Immediate

Siri Wolfram Alpha became especially memorable because it showed the difference between retrieving information and computing an answer.

A conventional search engine could locate pages containing a formula. Wolfram Alpha could apply that formula to the values supplied by the user. It could interpret units, compare quantities, calculate probabilities and organize factual data into a structured response.

That distinction allowed Siri to appear more knowledgeable than a voice interface simply reading search results aloud.

A request such as “What is 15% of $86?” could return the calculation directly. A question about the distance between planets could produce a value without requiring the user to inspect several websites. Wolfram Alpha could also answer unusually specific requests, including information about aircraft flying overhead when the necessary location and aviation data were available.

The system was not a large language model. It did not generate open-ended prose in the way current AI assistants do. Wolfram Alpha relied on curated data, symbolic computation, algorithms and formal representations of knowledge.

That structure provided an advantage that remains relevant: many answers could be calculated and traced through defined information rather than improvised statistically.

Early Siri combined several specialized capabilities instead of depending on one system to do everything. One provider might supply restaurant information, another could handle maps and Wolfram Alpha could process computational questions.

The assistant acted as the conversational coordinator.

This architecture made Siri seem like one intelligence even though the response could come from a network of separate services. Modern AI platforms have returned to a similar idea through tools, agents and external data connections. A language model may manage the conversation while calling a calculator, calendar, search engine or business system when a task requires reliable external action.

Siri demonstrated that model on a consumer smartphone more than a decade earlier.

A Small Integration Created a Large Expectation

The Wolfram Alpha partnership influenced how people began judging digital assistants.

Before Siri, voice features on phones were commonly associated with rigid commands such as calling a contact or selecting music. Siri invited users to speak more naturally and attempt questions that would previously have been typed into a browser.

The results were inconsistent, but successful interactions changed perceptions immediately. The iPhone appeared capable of understanding intent, reaching into a knowledge system and returning a concise answer through one conversational interface.

That apparent simplicity concealed substantial infrastructure. Speech recognition, language interpretation, location, personal context and external databases all had to work together quickly enough to preserve the feeling of a conversation.

Wolfram Alpha also gave Apple access to expertise that would have taken years to reproduce internally. Stephen Wolfram had spent decades building Mathematica and computational systems before launching the public knowledge engine.

Following the Siri announcement, Wolfram described the integration as a characteristically direct Steve Jobs decision: users wanted access to knowledge and actions without unnecessary intermediate steps.

That idea became more influential than any individual answer Siri provided.

The assistant did not need to show how many services had participated. It needed to understand the request and return the result.

Siri Wolfram Alpha - A circular, illuminated Siri icon floats against a dark, gradient background. The icon features swirling colors of blue, pink, and white, symbolizing the Apple Siri virtual assistant, reminiscent of modern communication apps like WhatsApp and Skype.

Early Siri Also Revealed the Limits of the Model

The first version of Siri could feel futuristic one moment and frustrating the next.

Some questions reached Wolfram Alpha correctly, while similar wording could trigger a web search or an unrelated response. Siri occasionally struggled to determine whether the user wanted a calculation, a local result or an action inside the phone.

Wolfram Alpha responses were also better suited to some subjects than others. Mathematical and scientific questions matched its computational structure, while casual conversation, current events and subjective requests required different sources.

Network dependence created another weakness. Early Siri processing relied heavily on remote servers, so delays or outages could make a basic request fail even when the iPhone itself was functioning normally.

Those limitations foreshadowed the central challenge surrounding modern assistants. A convincing interface encourages people to ask almost anything, but no single technical system performs equally well across every type of request.

Current generative AI can produce more natural language and handle a wider range of topics. It can also create confident errors when factual grounding is weak. The computational approach represented by Wolfram Alpha remains valuable precisely because some questions require verified data and exact calculation rather than fluent speculation.

The story behind the first Siri steps is therefore not only about an old iPhone feature. It shows that a powerful assistant needs more than a conversational personality. It requires access to dependable tools, structured knowledge and the ability to recognize when another system should provide the answer.

Siri Wolfram Alpha offered that lesson in 2011, long before AI assistants became capable of writing essays, interpreting screens and acting across apps.

The post Siri Wolfram Alpha Defined the First AI Assistant appeared first on AppleMagazine.

Researchers Say Two ‘Ancient Ramps’ Beside Egypt’s Red Pyramid May Actually Be Something Far More Significant

23 July 2026 at 13:49

For more than a century, two enormous structures cutting across the desert southwest of Egypt’s famous Red Pyramid have been assumed to be ancient transport features—perhaps roads or ramps used to haul limestone blocks during pyramid construction. However,  a new study argues that archaeologists may have been looking at the wrong answer all along.

Instead of transportation infrastructure, researchers now suggest the mysterious earthworks could represent a nearly 4,600-year-old sophisticated hydraulic engineering system, with two giant dams built to capture, regulate, and redirect water through the desert landscape.

If confirmed, the discovery would dramatically revise our understanding of how the builders of Egypt’s pyramids engineered not only stone, but water itself.

The new research, published in Nature Heritage Science, combines satellite imagery, historical maps, digital elevation modeling, watershed analysis, and paleoclimate data to reexamine the little-studied features at Dahshur, the royal necropolis where Pharaoh Snefru built both the Bent Pyramid and the Red Pyramid.

While no excavation has yet confirmed the interpretation, researchers argue that the structures display multiple characteristics far more consistent with dams than with construction ramps.

“This study presents, for the first time, evidence of two ancient, giant dams built across Wadi Dahshur, Egypt, along with a water diversion channel west of the Red Pyramid,” researchers write. “Satellite imagery and watershed mapping show that the two long structures, previously interpreted as stone transport ramps, exhibit the technical signature of dams, each extending 600–700 m and anchored to the valley flanks.”

Red Pyramid
Egypt’s Red Pyramid of Dahshur. (Image Source: Olaf Tausch/Wikicommons)

The findings add a fascinating new chapter to one of archaeology’s enduring mysteries. How did ancient Egyptians organize the enormous logistical operation required to construct the pyramids during the Fourth Dynasty?

The Red Pyramid, completed around 2600 BCE during Snefru’s reign, is widely recognized as Egypt’s first successful “true” pyramid. Scientists have spent decades studying the monument itself. However, much less attention has been devoted to the surrounding landscape and the engineering systems that may have supported its construction.

According to researchers, the wider landscape may have been far more technologically sophisticated than previously appreciated.

The two massive structures stretch approximately 2,000 to 2,300 feet (600 to 700 meters) across Wadi Dahshur. Earlier researchers interpreted one as a transport route leading from nearby quarries while considering the other a natural rise in the terrain. However, the new analysis points to several features that appear difficult to reconcile with those interpretations.

Rather than following the valley, both structures run directly across it, anchoring into the surrounding hillsides much like embankment dams. One also contains a distinctive zigzag geometry that the researchers argue resembles a duckbill spillway—a specialized overflow design still used in modern hydraulic engineering because it can safely release significantly larger volumes of water than a straight spillway of the same width.

No securely identified duckbill-style spillway has previously been documented from ancient Egypt. So if that interpretation is correct, it would mean that the Dahshur structure is one of the earliest known examples of this type of hydraulic design anywhere in the world.

Researchers believe the two structures may have functioned together as a multi-stage flood-control system.

In their proposed scenario, one dam traps sediment carried by flash floods while allowing cleaner water to pass into a second reservoir. From there, water could have been diverted through an artificial channel running remarkably close to the western side of the Red Pyramid before reconnecting with the surrounding drainage network.

That canal is especially intriguing because it raises the possibility that water may have played a more direct role in pyramid construction than traditionally assumed.

Red Pyramid
Historic Royal Air Force aerial photograph of Egypt’s Red Pyramid showing the two enigmatic linear structures southwest of the pyramid that a new study suggests may be ancient dams rather than long-assumed transport ramps. (Image Source: Royal Air Force/UCL Institute of Archaeology/Landreau, et al.)

Researchers have long known that the ancient Egyptians exploited waterways for transporting heavy stone. Previous discoveries at Giza revealed harbor basins and canals associated with pyramid construction, while papyrus records from Wadi el-Jarf describe crews transporting limestone by boat during Khufu’s reign.

The newly proposed Dahshur canal could represent another piece of that larger hydraulic network.

If maintained at a stable water level, it could have assisted in transporting heavy materials on barges or water-assisted sleds over relatively flat ground. Even beyond transportation, the water could have supported workers, supplied construction areas, mixed mortar, reduced dust, and later been adapted for irrigation or ceremonial uses.

The hypothesis also depends on a very different view of Egypt’s climate nearly 4,600 years ago.

Today, the Dahshur plateau lies within an extremely arid landscape, making the idea of dams initially seem ridiculous. However, paleoclimate evidence reviewed by the researchers suggests northern Egypt during the Old Kingdom was considerably wetter than it is today.

Although the Sahara was already drying following the end of the African Humid Period, seasonal rainfall appears to have remained substantially higher than modern levels. Even infrequent storms could have produced powerful flash floods racing through normally dry wadis.

The study estimates that while average annual rainfall may have ranged between roughly 2 to 6 inches (50 to 150 millimeters), individual storm events could generate enough runoff to create destructive floodwaters requiring engineered control systems. Rather than depending solely on the annual Nile inundation, Egyptian engineers may also have exploited seasonal runoff flowing through desert valleys.

That broader perspective fits with growing evidence that water management extended well beyond the Nile floodplain itself.

Other nearby examples showing evidence of water management well beyond the Nile floodplain include the famous Sadd el-Kafara dam, located less than 12 miles (20 kilometers) east of Dahshur, which is generally regarded as one of the world’s oldest large dams.

Additional archaeological sites around Saqqara and Giza likewise show increasing evidence of canals, flood-control structures, and carefully engineered landscapes associated with pyramid construction.

Even so, the researchers stress that their interpretation is still a hypothesis awaiting archaeological confirmation.

The structures themselves have never been excavated. Much of the area lies within a military zone, limiting direct access, while centuries of windblown sand have buried much of the earliest construction. Modern roads, pipelines, and other infrastructure have also altered parts of the site, making efforts to reconstruct its original appearance more difficult.

Future excavations will therefore be critical. Researchers hope sediment studies could determine whether deposits behind the structures resulted from flowing water rather than drifting desert sand.

Excavations may also reveal construction techniques, protective stonework, spillway features, and datable material capable of establishing whether the structures truly belong to Snefru’s era.

If those investigations support the new interpretation, they would suggest that Old Kingdom engineers possessed a much wider understanding of landscape-scale hydraulic engineering than previously identified.

More intriguing, the study hints that similar forgotten infrastructure could still lie covered beneath Egypt’s deserts, disguised as ordinary landscape features or misidentified for generations.

“Nevertheless, the convergence of geomorphological evidence, watershed connectivity, hydraulic plausibility, and regional cultural context supports the interpretation of the Dahshur structures as intentional large-scale hydraulic installations rather than incidental landscape features,” researchers write. “Other hydraulic structures are most probably lost in the desert, waiting to be identified as such.”

The recent study, “Two possible ancient dams near the Red Pyramid on the Dashur Plateau, Egypt,” by Xavier Landreau, Guillaume Piton, and Sayed Hemeda, appeared in npj Heritage Science. 

Tim McMillan is a retired law enforcement executive, investigative reporter and co-founder of The Debrief. His writing typically focuses on defense, national security, the Intelligence Community and topics related to psychology. You can follow Tim on Twitter: @LtTimMcMillan.  Tim can be reached by email: tim@thedebrief.org or through encrypted email: LtTimMcMillan@protonmail.com 

Archaeologists Unearth “Exceptionally Well-Preserved” 2,600-Year-Old Wooden Beams Burned in the First Temple Fire

22 July 2026 at 13:29

Archaeologists from the Israeli Antiquities Authority and Tel Aviv University, conducting excavations in the City of David, have unearthed massive wooden beams burned during the destruction of the First Temple in 586 BCE.

The research team behind the discovery notes that the huge wooden support beams, which were surprisingly well preserved for ancient wood structures, allow for much more precise dating of the site. The researchers also highlight the apparently deliberate efforts by the city’s rebuilders to leave the ruins in place for future generations to witness.

2,600-Year-Old Wooden Beams Preserved by Melting Plaster

According to a statement emailed to The Debrief, the ancient, charred wooden beams discovered within the Jerusalem Walls National Park were relics from a collapsed building destroyed by “the intense fire of the First Temple’s destruction” over 2,600 years ago.

“The beams appear to have served as the roof of an inner courtyard in a building from the First Temple period,” explained Excavation Director Efrat Bocher.

Burnt tree trunks exposed in the City of David. Photo by Reut Vilf, City of David.

Although not unprecedented, the team said that finding intact wood relics of this advanced age is rare, since organic materials like wood typically break down over such extended time periods. In this case, they suggest that the surprisingly intact beams were likely preserved by melting plaster, “sealing the burnt wood beneath.”

“During the destruction, they collapsed onto the floor,” Director Bocher explained. “We believe that the plaster cladding of the building’s walls, melted by the fire, covered the charred wooden beams, and ultimately enabled their exceptional preservation.”

Growth Rings Help Archaeologists Narrow the Site’s Dating Range

When discussing the historic and scientific value of the discovery, Dr. Johanna Regev of the Israel Antiquities Authority, who studied the wooden beams up close, noted the exceptional rarity of finding ancient wood with “such a large number” of visible growth rings.

“Here, in the City of David, we found thick beams with many rings, offering significant research potential,” Dr. Regev said.

2,600-year-old wooden beams from the First Temple fire
The tree rings that were exposed in the City of David. Photo by Efrat Botzer.

For example, the researcher explains, more growth rings help scientists date sites and materials with increased precision and “higher dating resolution.”

“Until now, we could date finds within a range of hundreds of years,” Dr. Regev explained. “Now we can attain much greater precision, narrowing the dating range down to as little as ten years.”

City’s Rebuilders Left Ruins in Place as a “Testament to the Destruction”

While the historic site was witness to a tragic destruction, the research team said returning residents beginning to rebuild the city appear to have intentionally left the remains untouched for future generations to see.

“[They] probably made a deliberate decision to preserve the memory of the destruction by leaving behind remains that tell the story of the catastrophe,” the team explained.

2,600-year-old wooden beams from the First Temple Fire
Ruins of the destruction uncovered in the Israel Antiquities Authority excavations at the City of David. Photo by Reut Wilf, City of David.

Dr. Yiftah Shalev, who directs the excavation on behalf of the Israel Antiquities Authority alongside Prof. Yuval Gadot of Tel Aviv University, said the idea of a landscape of memory is “familiar from many cultures around the world.”

“Preserving memory is a human need, seeking to preserve what once existed,” Dr. Shalev explained. “Here we see it in its clearest form: a deliberate choice to leave ruins in place as a testament to the destruction and build the new layer over them.”

On a more personal note, Director Bocher noted the serendipitous timing of the discovery “just before Tisha B’Av.” According to Hillel.org, the holiday, which is recognized as the saddest day on the Jewish calendar, “is a day of mourning for tragedies across Jewish history, most particularly the destruction and loss of the first and second Temple and Jerusalem.”

“This discovery makes you feel that you are witnessing the very moment of destruction, the moment when it all happened,” the researcher concluded, adding that “it’s deeply moving.”

Christopher Plain is a Science Fiction and Fantasy novelist and has spent the last six years as Associate News Editor and Head Science Writer at The Debrief. Follow and connect with him on X, learn about his books at plainfiction.com, or email him at christopher@thedebrief.org

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