The Anthropocene became part of the zeitgeist after Nobel laureate Paul Crutzen launched the idea in 2000. This is the notion that a crescendo of human impacts has recently propelled Earth out of the relatively stable climatic conditions of the Holocene epoch, during which human civilization developed and flourished, to produce a new kind of planet.

The Anthropocene became part of the zeitgeist after Nobel laureate Paul Crutzen launched the idea in 2000. This is the notion that a crescendo of human impacts has recently propelled Earth out of the relatively stable climatic conditions of the Holocene epoch, during which human civilization developed and flourished, to produce a new kind of planet.

Researchers at King's College London have developed a new mathematical framework to test whether AI systems that appear to explain their decisions are genuinely transparent.

The Denisovans, the enigmatic archaic human relatives first identified from a finger bone and a handful of teeth in a Siberian cave, have long been known almost exclusively through their DNA. Now, a landmark study published in Nature has pulled back the curtain on how these ancient hominins actually lived — what they ate, how they hunted, what tools they made, and the environments they braved — through an extraordinary assemblage of fossils and artefacts from Bianfu Cave in Yunnan Province, southwestern China. The findings paint the most detailed portrait to date of Denisovan biology, behaviour and ecology in eastern Asia, and suggest that these vanished people left a deep genetic and cultural imprint on later populations across Southeast Asia and Oceania.

The research team, led by Qingfeng Ruan, Hua Li and Song Xing and their colleagues, conducted a comprehensive analysis of hominin fossils and the associated archaeological remains recovered from Bianfu Cave. The hominin fossils themselves date to roughly 167,000 to 134,000 years ago, placing them firmly in the Middle Pleistocene. But the cultural sequence preserved in the cave’s sediments is far longer, stretching from approximately 190,000 years ago to about 70,000 years ago. That span — some 120,000 years of continuous or near-continuous occupation — makes Bianfu Cave one of the longest cultural records that can most parsimoniously be attributed to Denisovans anywhere in the world.

The Denisovan identity of the fossils was established through two independent and technically demanding lines of evidence. The first involved analysis of the enamel–dentine junction, the internal boundary between the enamel cap and the underlying dentine of the teeth. This three-dimensional morphological interface acts something like a fingerprint of evolutionary relationships, revealing diagnostic traits of the tooth’s internal architecture that are invisible from the outside but characteristic of particular hominin lineages. The second line of evidence came from palaeoproteomics, the recovery and identification of ancient proteins preserved within fossilized tissues. Because proteins are far more abundant and durable than DNA, they can survive in warm, humid environments like those of southern China, where genetic material degrades rapidly. Sequencing these ancient proteins allowed the researchers to place the Bianfu hominins on the Denisovan branch of the human family tree with confidence.

The fossil collection itself is remarkable. It includes four teeth that substantially expand the known range of dental variation within the Denisovan lineage — a critical contribution, since Denisovans were previously represented by a very small number of dental specimens, making it difficult to gauge how variable their teeth could be. The new fossils also include two cranial fragments and a radius, a forearm bone, providing rare glimpses of Denisovan skull and postcranial anatomy that were previously almost entirely unknown. Together, these remains transform Denisovans from a genome and a scatter of isolated teeth into a population with recognizable skeletal biology.

Beyond the fossils, the archaeological record from Bianfu Cave offers something equally precious: a window into Denisovan daily life. The researchers reconstructed the ancient environment using faunal remains and pollen preserved in the cave deposits. These records indicate that across Marine Isotope Stages 6 through 4 — a period encompassing major glacial–interglacial climatic swings between roughly 190,000 and 57,000 years ago — the landscape around the cave was dominated by coniferous forest or a mosaic of forest and steppe. This was a cool, variable environment that Denisovans exploited successfully across tens of thousands of years, demonstrating a resilience to climatic change that adds to growing evidence of their adaptability, from the high altitudes of the Tibetan Plateau to the subtropical latitudes of mainland Southeast Asia.

The subsistence evidence is particularly striking. Analysis of the animal bones from the cave shows that its inhabitants practised specialized hunting focused on medium- to large-bodied prey. This was not opportunistic scavenging but a sustained, targeted hunting strategy — one that would have required knowledge of animal behaviour, coordinated effort and effective weaponry. Specialized big-game hunting of this kind has often been associated with modern humans and late Neanderthals in western Eurasia, so finding it in a Denisovan context more than 150,000 years ago dramatically narrows the perceived behavioural gap between these archaic lineages and our own species.

Yet the technological strategy documented at Bianfu Cave is, at first glance, surprisingly simple. The stone tool assemblage is characterized by expedient core reduction and tool production — that is, the inhabitants struck flakes from cores as needed, used them, and discarded them, rather than investing in carefully shaped, curated tools that were carried, maintained and resharpened over time. Alongside this, the Denisovans of Bianfu Cave made pervasive use of unmodified bones, employing skeletal elements of their prey directly as tools without altering them beforehand.

Taken together, the researchers interpret this pattern as an adaptive system that prioritized the exploitation of what they call object affordance — the inherent functional possibilities already present in a raw material or object — over intensive tool manufacture. A suitably shaped bone fragment could serve as a hammer, a digging implement or a scraping tool with little or no modification; a sharp flake struck from a convenient core could cut and butcher without further refinement. In the rich, resource-diverse environments of subtropical southwestern China, where raw materials and animal resources were plentiful, such a flexible, low-investment strategy may have been not a sign of simplicity but a highly efficient way of life. It suggests that Denisovans measured success not by the sophistication of their toolkit but by how skilfully they read and exploited the opportunities their landscape provided.

This behavioural portrait gains added significance when set against the wider geography of Denisovan presence. Over the past decade and a half, Denisovans have been documented across a staggering range: from the original genomic discoveries in the Altai Mountains of Siberia, first reported in 2010, to the mandible from the Tibetan Plateau described in 2019, Denisovan DNA recovered from sediments at Baishiya Karst Cave in 2020, a molar from the Annamite Chain of northern Laos announced in 2022, a male Denisovan mandible from Pleistocene Taiwan reported in 2025, and proteomic identification of the 146,000-year-old Harbin cranium, also in 2025. Bianfu Cave now anchors this story firmly in southwestern China, a region long suspected to have been a Denisovan heartland and a critical corridor for hominin movements between mainland Asia and Southeast Asia.

The study’s authors argue that the region’s Denisovans point to a substantial genetic and cultural legacy in later human populations. Modern populations in Southeast Asia and Oceania carry the highest known proportions of Denisovan ancestry anywhere in the world — a legacy of interbreeding that occurred as modern humans moved through and beyond island Southeast Asia. The new evidence from Bianfu Cave suggests that the ways of life practised by Denisovans in this region — their hunting strategies, their flexible technological approaches, their hard-won knowledge of tropical and subtropical environments — may have been part of the inheritance, alongside their genes, that helped later human populations thrive as they spread across the diverse and challenging landscapes of Asia and the Pacific.

For palaeoanthropologists, the significance of the Bianfu Cave discoveries is difficult to overstate. Denisovans have been the least anatomically documented of all known hominin groups — a lineage defined first by DNA and only slowly fleshed out with fragmentary fossils. The new teeth, cranial fragments and radius from Yunnan, combined with an unmatched 120,000-year archaeological sequence, mean that researchers can finally study Denisovans not just as a genome or a set of molecular signatures but as a living, adapting population: hunters of large game, makers and users of expedient tools, and inhabitants of conifer forests that swung between glacial cold and interglacial warmth. As analysis of the Bianfu material continues, it promises to reshape our understanding of how archaic humans lived in eastern Asia and how deeply their story is woven into our own.

Canada's last epishelf lake drained into the Arctic Ocean following the 2020 breakup of the Milne Ice Shelf and will not recover, a new study confirms.

Canada's last epishelf lake drained into the Arctic Ocean following the 2020 breakup of the Milne Ice Shelf and will not recover, a new study confirms.

In a development that could reshape how chemists recycle one of the most persistent classes of synthetic molecules ever made, researchers have reported a new catalytic strategy that strips fluorine atoms from perfluoroalkyl chains in a controlled, sequential fashion while installing a single boron group at the chain’s terminus. The work, published in Nature Communications, introduces what the authors call zipper polydefluorination-monoborylation, a transformation that walks down a perfluoroalkyl skeleton and removes multiple fluorine atoms in a stepwise cascade before capping the partially defluorinated product with a boron substituent. The achievement addresses a longstanding challenge in fluorine chemistry: while carbon-fluorine bonds are prized in materials and pharmaceuticals for their extraordinary stability, that same stability makes them notoriously difficult to break selectively, leaving chemists with few tools for converting perfluorinated waste streams into useful building blocks.

Perfluoroalkyl substances, often grouped under the umbrella of PFAS chemistry, owe their remarkable properties to the strength of the carbon-fluorine bond, which at roughly 485 kilojoules per mole in fully fluorinated chains ranks among the strongest single bonds that carbon forms. This bond strength, combined with the sheer electronegativity of fluorine, means that perfluoroalkyl groups resist oxidation, hydrolysis, and thermal degradation under nearly all conventional conditions. As a consequence, perfluorinated chains accumulate in the environment and resist standard degradation pathways, prompting intensive research into defluorination methods ranging from photocatalytic single-electron transfer to reductive hydrodefluorination with metal hydrides. Yet most existing approaches suffer from a common limitation: they either remove fluorine indiscriminately, collapsing the entire chain to a mixture of products, or they remove only a single fluorine atom, offering little control over the degree of defluorination. The new study demonstrates a way to achieve the best of both worlds, delivering multi-fluorine removal in a predictable pattern while simultaneously introducing a versatile functional handle.

The conceptual heart of the method lies in what the authors describe as a zipper mechanism. Rather than removing fluorine atoms at random positions along the chain, the reaction initiates at a defined site and then propagates along the perfluoroalkyl backbone one carbon at a time, much as a zipper opens tooth by tooth. At each step along the chain, a fluorine atom is expelled and replaced in sequence, with the reaction front advancing until a thermodynamic or kinetic stopping point is reached. The monoborylation component of the process ensures that once the zipper has run its course, the resulting olefinic or anionic intermediate is intercepted by a boron reagent, furnishing a product in which the boron group occupies a predictable position derived from the original perfluoroalkyl terminus. Organoboron compounds are among the most valuable intermediates in modern synthetic chemistry, serving as partners in Suzuki-Miyaura cross-coupling and as precursors to alcohols, amines, and halides, so their installation at a defluorination site effectively converts a chemical dead end into a synthetic launching pad.

Mechanistically, the transformation draws on the characteristic reactivity of organoboron reagents toward geminal difluoroalkenes, the partially defluorinated intermediates that arise when consecutive fluorine atoms are eliminated from a perfluoroalkyl chain. Perfluoroalkyl chains, when subjected to strong bases or reductive conditions, can undergo sequential beta-fluoride elimination events, each generating a more highly unsaturated species. The boron reagent in the reported system engages these unsaturated intermediates through addition pathways that install boron at the terminal carbon while generating a carbanionic center adjacent to the remaining difluoromethylene unit. That newly formed carbanion is perfectly positioned to expel another fluoride ion, regenerating an unsaturated handle one carbon further down the chain and setting up the next iteration of the cycle. This intimate coupling of borylation and defluorination is what gives the reaction its chain-walking character: each borylation event creates the conditions for the next defluorination event, and the process ripples along the chain until the fluorine reservoir is exhausted or the reagents are consumed.

The practical significance of the work becomes apparent when one considers the fate of the fluorine atoms themselves. In the zipper process, fluorine is released as fluoride ion, which under the reaction conditions is sequestered by silicon-containing trapping agents to form robust silicon-fluorine bonds. Fluorosilicates of this kind are stable, isolable, and, importantly, compatible with industrial processes for recycling fluorine back into hydrofluoric acid, the feedstock from which essentially all synthetic organofluorine compounds are made. In this sense, the method does more than transform perfluoroalkyl chains into borylated products; it also lays the groundwork for closing the fluorine cycle, recovering the fluorine content of persistent molecules in a form that can be fed back into the chemical economy. With global concern over PFAS contamination intensifying and regulatory pressure on fluorinated chemicals mounting, technologies that enable fluorine recovery rather than dilution into the environment carry considerable weight.

From a synthetic chemistry standpoint, the products of the reaction open multiple downstream avenues. Because the boron substituent is installed at a defined position on a partially fluorinated alkyl or alkenyl framework, the resulting molecules retain a programmable mixture of carbon-fluorine bonds and carbon-boron functionality. The remaining fluorine atoms can tune the lipophilicity, metabolic stability, and dipole moment of the scaffold, properties that are actively exploited in medicinal chemistry when designing fluorinated drug candidates. Meanwhile, the boron group serves as a convertible handle, allowing the defluorinated carbon center to be joined to aromatic rings through cross-coupling, oxidized to alcohols, or aminated in homologation reactions. In effect, the method converts a chemically inert perfluoroalkyl group, useful mainly as a passive coating or tail, into a functionalized partial-fluoro skeleton that can participate in the full toolkit of carbon-carbon and carbon-heteroatom bond formation.

The reported study also sheds light on the factors governing how far the zipper travels along a given chain. Chain length, the nature of the substituent anchoring the perfluoroalkyl group, and the stoichiometry of the base and boron reagent all influence the number of fluorine atoms removed and the distribution of products obtained. Through systematic variation of these parameters and careful analysis of the reaction mixtures by nuclear magnetic resonance spectroscopy and mass spectrometry, the authors map out the scope of the transformation across a range of perfluoroalkyl substrates, from short perfluoroethyl groups to longer chains approaching those found in commercial fluorosurfactants. Control experiments interrogating individual elementary steps support the proposed sequential elimination-addition mechanism and rule out alternative pathways involving radical fragmentation or random beta-scission, underscoring the unusually high degree of positional control the method achieves.

Beyond its immediate synthetic utility, the work contributes to a growing body of research aimed at taming the carbon-fluorine bond through the strategy of defluorinative functionalization. Over the past decade, chemists have developed an impressive repertoire of reactions that replace fluorine in perfluoroalkyl and fluoroarene substrates with groups ranging from hydrogen to sulfur, nitrogen, and carbon substituents. What distinguishes the zipper approach is its multiplicity and its directionality: instead of a single substitution event at a single site, the reaction performs many substitutions in a choreographed sequence along a chain, effectively treating the perfluoroalkyl group as a one-dimensional lattice to be patterned at will. This conceptual reframing, from defluorination as bond-breaking to defluorination as programmable editing, may inspire analogous strategies for other polyfluorinated motifs, including perfluoroarenes and perfluoropolyethers, two additional classes of highly persistent fluorinated materials.

Challenges remain before such chemistry can move from the laboratory bench to environmental remediation at scale. The reaction conditions reported rely on strong bases and moisture-sensitive boron reagents handled under inert atmosphere, and the substrates studied are discrete, soluble perfluoroalkyl compounds rather than the polymeric or adsorbed PFAS species that dominate environmental contamination. Scaling the chemistry will require sourcing boron reagents economically, managing the large quantities of fluoride generated, and integrating the transformation with upstream methods for extracting perfluoroalkyl pollutants from water and soil. Nevertheless, the demonstration that a perfluoroalkyl chain can be unzipped in a controlled manner, with fluorine captured in recyclable form and a valuable boron handle installed, establishes a credible chemical pathway toward defluorination that is both productive and selective, a combination that has eluded the field for decades.

As policymakers and scientists grapple with the legacy of fluorine chemistry, work of this kind illustrates a middle path between the wholesale abandonment of fluorinated molecules and their indefinite persistence in the biosphere. The fluorine atom confers properties that industry and medicine continue to depend upon, and the ability to disassemble fluorinated architectures on demand, recovering both the carbon skeleton as a functionalized building block and the fluorine content as a recyclable salt, points toward a more circular future for organofluorine chemistry. The zipper polydefluorination-monoborylation strategy reported in Nature Communications is an early but striking example of that vision made concrete at the molecular level, and it is likely to prompt rapid efforts to extend the concept across the breadth of persistent fluorinated chemicals.

Des camions frigorifiques stationnés devant les morgues, faute de place pour les corps : en juillet 1995, une semaine de canicule fait 739 morts à Chicago. Les analyses menées ensuite ont désigné un facteur aggravant que personne n'avait anticipé, et qui n'a rien de météorologique.

Beyond Blue has launched "The Future We Choose: Mental health support in Australia through the next decade of change," a new strategic foresight report by Australia's national science agency, CSIRO, exploring how mental health in Australia may evolve over the next decade and the choices that could help shape a stronger, more connected and resilient future.

Beyond Blue has launched "The Future We Choose: Mental health support in Australia through the next decade of change," a new strategic foresight report by Australia's national science agency, CSIRO, exploring how mental health in Australia may evolve over the next decade and the choices that could help shape a stronger, more connected and resilient future.

• NordVPN blocked over 5 million malware attempts in January alone
• 99% of phishing attacks impersonate just 300 brands
• AI tools and fraud kits mean attackers no longer need advanced skills

We are well past the days when a cyberattack meant mass-mailing a poorly spelled virus. In 2026, cybercriminals are heavily leveraging generative AI to make their scams highly personal, industrializing fraud on a massive scale.

That is the stark warning from the Consumer Cybersecurity Report: Dismantling the Evolving Threat Landscape, published today by NordVPN. Analyzing threat intelligence data from the first half of the year, the prominent cybersecurity and best VPN provider uncovered that the most exploited vulnerability right now isn't outdated software; it is human trust.

Armed with unrestricted AI models and ready-to-use fraud kits, scammers have drastically lowered the entry barrier for digital crime. The focus has decisively shifted from complex technical exploits to highly targeted campaigns that weaponize greed, urgency, and our faith in familiar brands.

"Bad actors are weaponizing our natural instinct to believe what we see and hear," says Marijus Briedis, CTO at NordVPN, warning that these attacks no longer require advanced skills or significant resources. "Anyone with an internet connection can launch them."

It's in this context that "A single human error is now more likely than ever and likely to be more devastating than ever," Briedis added.

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The numbers behind the threat

NordVPN analyzes 12 million unique URLs daily, blocking an average of 130,000 malicious pages every 24 hours before they can reach a user — a critical defense mechanism as NordVPN’s antivirus tool continues to block massive volumes of malicious sites.

Malware remains the single largest threat by volume. January 2026 saw a massive peak of over 5 million blocked attempts as attackers preyed on post-holiday shoppers. Most of these were infostealers aiming to grab saved login credentials.

The US was the hardest hit with 4.89 million attempts across the first half of the year, followed by the UK (2 million) and Germany (1.32 million).

Phishing is equally rampant. NordVPN blocked over 4.4 million phishing attempts in the first half of the year, noting that 99% of these attacks impersonate a narrow list of just 300 brands, often disguised as fake job recruiter campaigns.

Microsoft was the most impersonated company (16.12%), followed by Roblox (12.32%), Google (9.94%), and Netflix (5.99%). Adding to the danger, attackers frequently exploit the trusted .com domain, which accounts for 43.2% of all intercepted scams.

NEW: Leave No Trace — A weekly newsletter on digital privacy and online surveillance.

Leave No Trace investigates the companies and governments putting our digital freedom at risk — and the people fighting back.

📩 Subscribe now to get every edition delivered to your inbox every Friday, launching this September.

Hijacked sessions and the Dark Web

While users are increasingly wary of downloading fake apps or clicking shady links hidden in pirate sites, attackers are finding stealthier ways in.

Between January 1 and May 26, 2026, a staggering 94 billion cookies were exposed online. Of these, 1.2 billion were active session cookies, which cybercriminals can use to hijack accounts without needing a password, often completely bypassing multi-factor authentication (MFA).

Once data is stolen, it is swiftly commodified. Using its Dark Web Monitoring tools, NordVPN identified 8.4 million compromised accounts in just 90 days.

Frighteningly, over 47% of the exchanged data involved physical addresses and full names, allowing attackers to weave digital and real-world identifiers together into comprehensive victim profiles.

Telephony isn't safe, either. Between the service's launch and June 16, NordVPN blocked nearly 29,000 scam calls and issued spam warnings to over 525,000 users.

How to stay safe

Because technical barriers for criminals are lower than ever, defensive strategies must evolve. NordVPN's report stresses that consumer protection now requires a mix of both technological defenses and behavioral resilience.

Alongside using security tools like a virtual private network (VPN) and antivirus software, users must cultivate a healthy skepticism. If a message, email, or website demands urgent action or offers something too good to be true, pause and verify.

In the age of AI-driven fraud, a moment of hesitation is your best line of defense.

For the first time, astronomers have pointed NASA’s two flagship space telescopes at the same patch of sky beyond Neptune and let them work as a team. Hubble handled the visible light. Webb handled the infrared. Together, they picked out 27 previously unknown trans-Neptunian objects, or TNOs — small, icy bodies that drift in the […]

Indonesia's Mount Anak Krakatau has erupted again this week, sending plumes of volcanic ash high into the sky and disrupting hundreds of flights. More than 300,000 passengers have been affected.

Indonesia's Mount Anak Krakatau has erupted again this week, sending plumes of volcanic ash high into the sky and disrupting hundreds of flights. More than 300,000 passengers have been affected.

As countries compete for skilled workers and grapple with aging populations and labor shortages, understanding who is moving across borders is increasingly important. A new study provides the first global data set of immigration composition disaggregated simultaneously by age, sex and educational attainment, offering a new basis for tracking brain gain and brain drain and improving population projections.

As countries compete for skilled workers and grapple with aging populations and labor shortages, understanding who is moving across borders is increasingly important. A new study provides the first global data set of immigration composition disaggregated simultaneously by age, sex and educational attainment, offering a new basis for tracking brain gain and brain drain and improving population projections.

As countries compete for skilled workers and grapple with aging populations and labor shortages, understanding who is moving across borders is increasingly important. A new study provides the first global data set of immigration composition disaggregated simultaneously by age, sex and educational attainment, offering a new basis for tracking brain gain and brain drain and improving population projections.

• Aldi is bringing back its cheap KitchenAid-rival stand mixer
• It's available in-store from September 13
• It costs £35, and packs four attachments and eight speed settings

Aldi is replenishing its Specialbuys range once again, and this time it’s bringing back an old friend — its popular classic stand mixer that's a cheaper alternative to KitchenAid and Kenwood appliances.

Returning to shelves this weekend (September 13), Aldi’s £35 stand mixer will be available to purchase again after its last in-store appearance some six months ago. The mixer also arrives just in time for the long-awaited return of Bake Off, so you can aim to take your baking skills from novice level to being worthy of the ‘Hollywood handshake’.

For its cheap price, Aldi’s stand mixer packs all the basics you need for home baking and comes in two colors — a soft, baby green, and a vibrant red. So, if you’re not too worried about missing out on premium features, it’s enough to get you by.

Firstly, it comes with four dishwasher-safe attachments including a beater, whisk, dough hook, and splash guard, adding a dash of versatility to its baking options. And because of its swivel motor head, it makes it easier for swapping out attachments and general bowl access.

Speaking of its mixing bowl, this is where Aldi’s appliance wins over the likes of its big dog rivals. Compared to the KitchenAid Artisan Plus’ 4.7-liter bowl, Aldi’s slightly bigger 5-liter capacity allows for baking in large batches, ideal for if you’ve got a big family of hungry mouths to feed or whether you’re a keen meal prepper who wants to get ahead on your weekly delicacies.

It doesn’t fall short on its speed functions either, packing eight different settings so you can combine ingredients at the correct speed needed for your recipes. Additionally, the pulse function is a handy tool for when you need short bursts of high power, giving you added control.

Aldi is stacked with affordable versions of premium appliances — it hasn’t long launched a cheap Dyson-style stick vacuum and £20 air fryer — but there’s a reason why its products fall on the cheaper end of the spectrum. It doesn’t boast the advanced features that set KitchenAid mixers hundreds of pounds higher and it uses more power (420W), but aside from this, Aldi’s version is certainly enough to get you by if you’re not worried about missing out on the finer details.

As mentioned Aldi will be relaunching its stand mixer on September 13, and if you’re a seasoned Specialbuys customer by now, you’ll know that once its stand mixer has been cleared from the shelves, your chances at scoring one will be slim.

New research challenges the idea that career shocks are bad news for expatriate workers, finding that major personal, professional or societal disruptions can instead act as a catalyst for adaptation and resilience.

Quantum error correction must detect and correct errors without directly reading the quantum information. Classical low-density parity check (LDPC) codes have a well-established design theory: by choosing how many checks connect to each bit, retaining appropriate randomness, and avoiding short loops, designers can pursue both a large minimum distance and a threshold phenomenon in which the decoding failure rate drops sharply below a predicted noise level.