That delay matters less than what the bones and teeth turned out to contain. A new study using microcomputed tomography, a non-destructive scanning method that reads the internal structure of bone and dentin in three dimensions, has reconstructed how this fetus’s skeleton was forming in the weeks before it died, and found something unexpected buried inside the teeth of the other two children from the same cave.

Sesselfelsgrotte is one of the richest Middle Palaeolithic sites in western Europe, a rock shelter near Essing with a deep, complicated stratigraphy and a long excavation history. The fossils in question come from three separate layers and were never associated with each other in life, only in deposition. Sesselfelsgrotte 1, the fetal skeleton, comes from layer G5, dated through thermoluminescence to somewhere around the very end of one glacial stage or the very beginning of the next, roughly 50,000 to 90,000 years ago. The upper molar, Sesselfelsgrotte 2, comes from layer M2 and carries a more precise weighted age of about 75,900 years. The lower molar fragment, Sesselfelsgrotte 3, is harder to date but sits in the same general window.

When Thomas Rathgeber first examined the fetal bones in 2006, working from external measurements alone, he noted that the humerus and femur showed a robusticity closer to Homo neanderthalensis than to Homo sapiens, and estimated, by comparing the specimen against modern human and other Neanderthal fetal remains, that this individual died around eight months into gestation. His conclusion, translated from the original German, was direct: the bones likely belonged to a pregnant Neanderthal female who lost her child late in pregnancy during a stay at the site. He flagged the alternative readings too, including deliberate burial or simple natural deposition in cave sediment, and left the question open. A subsequent ancient DNA analysis1 of the femur has since confirmed the individual was in fact Neanderthal, closing off any doubt about species identity even as the circumstances of death remain unresolved.

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That single grave, multiplied across four cemeteries and forty-six individuals, is the core of a study just published in Nature,1 led by Ruairidh Macleod, Frederik Seersholm, Martin Sikora, and Eske Willerslev, working with the long-running Baikal Archaeology Project under Andrzej Weber. The team sequenced ancient DNA from teeth recovered at sites along the Angara, northwest of Lake Baikal, and found Yersinia pestis in eighteen of forty-six people. That is a 39 percent detection rate, which sounds almost implausibly high until you remember that ancient pathogen DNA degrades and that comparable PCR screening of known Black Death victims at a London plague pit returned a detection rate of only about 20 percent. The true infection rate among these Siberian hunter-gatherers was very likely even higher than what the genetics alone could capture.

These people lived around 5,500 years ago. They were not farmers. They were not living in dense settlements. There were no rats riding grain ships, no fleas adapted to a human commensal niche, none of the conditions textbooks usually treat as prerequisites for plague to become an epidemic disease. They fished the Angara, hunted, moved with the seasons, and buried their dead in family plots that, it turns out, sometimes filled up all at once.

The puzzle had actually been sitting in the archaeological record since the 1990s. Excavators working these cemeteries had long noted an oddly high number of child and adolescent burials, clustered in narrow windows of time, with siblings and even parents and children interred together. Nobody had a clean explanation for it. The assumption, reasonable at the time, was that early strains of Yersinia pestis simply weren’t dangerous enough to cause this kind of pattern. Genomic work over the past decade had shown that the oldest known plague genomes, from Bronze Age Sweden and a hunter-gatherer in Latvia, lacked the genes that let plague hitch a ride in flea guts and erupt as the swollen-lymph-node bubonic form familiar from medieval history. Without those genes (ymt and the YpfΦ prophage), some researchers argued, early plague might have looked more like a mild, foodborne illness related to its close cousin Yersinia pseudotuberculosis than like a mass killer.

The Baikal data overturns that assumption fairly bluntly.

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He now has an answer1 with the genomic resolution his earlier career lacked. A team led by Weixuan Ning and Corrinne Grover, with Wendel as senior author, sequenced 299 newly collected wild cotton plants from the Yucatán Peninsula and the coast of southwestern Florida and compared them against existing genomic data from domesticated cultivars, early landraces, and two related wild species. What they found does more than confirm a decades-old hypothesis. It sharpens it considerably. Upland cotton, Gossypium hirsutum, the species that accounts for roughly 90 percent of cotton grown today, traces its domestic lineage to one specific patch of coastal scrubland in northwestern Yucatán, a region that still carries more genetic diversity than anywhere else the species exists in the wild.

The hypothesis itself isn’t new. Wendel and colleagues proposed a Yucatán origin more than thirty years ago, using allozyme markers and RFLP data that, by today’s standards, amounted to squinting at the problem through a keyhole. The basic geography held up, but the methods couldn’t distinguish a broad regional origin from a precise one, and they couldn’t rule out the possibility that the “wild” cotton being sampled wasn’t actually feral, escaped cultivars gone rogue and readopting wild traits while still carrying the genomic fingerprints of domestication underneath. Telling truly wild cotton apart from feral cotton turns out to be one of the harder problems in this field, since a domesticated plant can drift back toward wild-looking morphology within a few generations while its genome quietly remembers where it came from.

Sorting that out required two things the earlier studies didn’t have: cheap whole-genome sequencing and an enormous number of plants collected in the right places. The team built a new reference genome from a Yucatán accession, assembled from PacBio and Hi-C data into 26 chromosomes, and used it as the scaffold for comparing 392 cotton genomes total, spanning Florida, Puerto Rico, Guadeloupe, the Yucatán, modern cultivars, two early landrace groups, and the related species Gossypium barbadense and Gossypium mustelinum as outgroups.

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This is the kind of detail that makes middens interesting to archaeologists in the first place. A midden is just a trash heap, but a very informative one: bones, shells, broken tools, and waste accumulate in layers, and each layer is a snapshot of what people ate, what animals they kept, and how they lived. Greenland has middens spanning roughly 4,500 years, left behind by successive and largely unrelated populations: Paleo-Inuit cultures arriving from North America starting around 2,500 BCE, Norse settlers who brought livestock farming with them from the 10th century onward, and Danish colonists from 1721. Each group dumped its waste in roughly the same kinds of places, and the cold did the rest. Permafrost is an excellent preservative.

What’s changing is the permafrost itself. The Arctic is warming nearly four times faster than the global average, and the layer of frozen ground that has kept these deposits sealed for centuries is thawing and eroding. This isn’t a hypothetical concern. In 2016, a thawing patch of permafrost on Russia’s Yamal Peninsula is believed to have released anthrax spores that had been dormant for decades, killing over 2,000 reindeer and at least one person. Researchers working in Siberia have also recovered viruses from permafrost still capable of infecting amoebae after tens of thousands of years frozen. Against that backdrop, a question that sounds almost like science fiction becomes a reasonable one to ask: are Greenland’s ancient trash heaps sitting on something similar?

A team led by researchers at the University of Copenhagen and the National Food Institute at the Technical University of Denmark set out to answer that, not by guessing, but by sequencing. Between 2018 and 2020 they collected 78 samples from middens at five sites, Paleo-Inuit deposits at Qajaa and Sermermiut, Norse middens at Kapisilit, and an early colonial midden at Nuuk, and compared them against 143 soil samples from the surrounding, undisturbed landscape. Using metagenomic sequencing, they reconstructed1 entire bacterial communities directly from the DNA in the soil, without needing to culture anything in a lab.

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That date is one of 124 now compiled by Ermengol Gassiot and his colleagues at the Universitat Autònoma de Barcelona, drawn from 45 sites inside the Aigüestortes i Estany de Sant Maurici National Park, a roughly 40,000-hectare stretch of granite peaks and glacially carved valleys on the eastern edge of the Aneto-Maladeta massif. The database, published alongside a paper in Archeologica Data,1 is the product of twenty years of survey and excavation by the High Mountain Archaeology Group, and it does something simple but rare in mountain archaeology: it puts dates on the map, not just artifacts.

This matters because high-mountain archaeology has spent most of its existence fighting an assumption baked into the discipline. Through much of the last century, rugged terrain above the treeline was treated as a backdrop for occasional, specialized activity, a place you fled to during conflict or visited briefly to do something that couldn’t be done lower down. Permanent or recurrent occupation wasn’t really on the table. Three decades of survey work across the Pyrenees, the Alps, and other ranges of the Mediterranean arc has slowly dismantled that picture, turning up architecture, rock art, burial structures, and artifact scatters at altitudes that earlier generations of archaeologists would have written off as empty. The Aigüestortes park, with 380 documented sites and counting, is one of the clearer test cases for just how wrong the old assumption was.

Most of those 380 sites, about two-thirds, are livestock-related architecture: huts, enclosures, the kind of structures you’d expect from people moving animals through seasonal pasture. Rock shelters and caves make up another fifth. There are stone circles that may be funerary monuments, a handful of charcoal kilns, and scattered evidence of metalworking. What the survey data couldn’t show, on its own, was when any of this activity happened. A site map tells you where people went. It doesn’t tell you whether they went there once, in 2000 BC, or every few centuries for ten millennia. That’s the gap this dataset is built to close.

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A new study1 by Fredrik Fahlander, an archaeologist at Stockholm University, argues that this half-finished footprint isn’t a curiosity. It’s a clue, one piece of a pattern that runs through hundreds of similar carvings along the coasts of southern Scandinavia. These are podomorphs, pecked images of feet made in large numbers throughout the Nordic Bronze Age, roughly 1700 to 500 BCE. They usually get filed alongside the boats, animals, and human figures that make up the rest of the period’s rock art, but they don’t quite belong with them. Boats, animals, and human figures tend to lie sideways across the rock, as if caught mid motion; podomorphs are oriented vertically instead. They show up just as often well inland as along the coast, unlike the figures that cluster near the water. And they are conspicuously absent from two places where the other figurative motifs do eventually turn up: burial markers and bronze objects.

Fahlander’s case study covers the Mälaren region, a dense cluster of rock art on Sweden’s east coast that surrounds a freshwater lake today but opened onto the sea during the Bronze Age. Swedish heritage records list more than 7,000 rock art sites here. Of these, 611 contain at least one figurative motif, and 140 of those include podomorphs: 627 of them in total. Most sites with podomorphs have only one. Fifty have exactly that. The count drops fast from there: twenty-eight sites with two, twenty-three with three, thirteen with four, and only a handful of outliers beyond that. Rickeby is one of those outliers. So is Koppartorp, with 43 footprints, and an erratic boulder at Köping with 25. The footprints themselves run from 9 to 31 centimeters long, with most clustering between 18 and 25. Taken as literal foot tracings, that range would put the majority at the feet of seven to ten year olds, an odd demographic to dominate a centuries-long tradition, while the carvings at either extreme fall outside any plausible human foot at all.

Earlier explanations for the pattern have not lacked imagination. One reading treats the footprints as tracks left by a god too elusive to depict any other way. Another ties them to death, marking a route from burial mounds on higher ground down toward the water, the boundary between the living and whatever waited beneath the waves. A third, the most common, takes the carvings at face value: marks of real people, made to record a presence, an initiation, a memory. Each idea explains some of what’s on the rocks and ignores the rest. Single and paired footprints turn up constantly at sites with no trace of any larger religious narrative. Their orientation doesn’t track consistently toward water, or away from burial mounds, or toward anything else in particular. And the literal-portrait reading still has to explain those impossible sizes at the small and large ends of the spectrum, footprints too tiny or too large to belong to any human foot of any age.

Fahlander’s paper steps around the question of what the footprints represent and asks instead what they were built to do.

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A new review article in the Annual Review of Anthropology,1 authored by Sean Tallman and colleagues at Boston University, examines why this gap between what skeletal biologists know and what they practice has proven so durable. The answer, they argue, is not primarily methodological. It is cultural, historical, and in some respects ideological.

The standard workflow in forensic osteology asks analysts to produce a biological profile from skeletonized remains: age at death, stature, ancestry or population affinity, and sex estimation. For the sex component, practitioners examine the pelvis, the skull, the long bones, and other features, then render a judgment: female or male. The methods are presented, and largely taught, as though the underlying biology were reliably dimorphic. It mostly is. But “mostly” is doing a lot of work in a field that feeds into medico-legal determinations about real people.

Sex in living humans is not a two-position switch. Hormonal profiles vary. Chromosomal patterns vary. External anatomy varies. So does internal anatomy, and so does the skeleton that develops under the influence of all of the above. Intersex conditions, transgender individuals whose bodies have been shaped by hormone therapies, and people who fall outside expected morphological ranges for their chromosomal sex all present complications that the binary framework handles poorly, or does not handle at all.

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If sleep science worked the way most public health messaging implies it does, that gap should show up in the data as a gap in wellbeing. Japan should look, on paper, like a nation quietly grinding itself down. It doesn’t. Diabetes rates, heart disease, obesity, life expectancy: none of it tracks with how long a country sleeps. In a separate analysis of 353 national sleep averages pulled from 14 different datasets covering 71 countries, the team found no relationship between a country’s average sleep duration and its rates of heart disease, diabetes, or life expectancy. Stranger still, countries where people slept longer had higher obesity rates, the opposite of the pattern researchers have repeatedly found when they study individuals within a single country.

This is the kind of result that should make you sit up. Not because it’s surprising in isolation. Findings about sleep and individuals are everywhere, and so are claims that whichever number a press release happens to favor is the one that will fix your life. What’s surprising is what happens when you zoom out from individuals to populations. The relationship between sleep and health doesn’t vanish at the national level. It gets reorganized.

What the Curve Actually Looks Like

Inside any given country, the study replicates the familiar shape: a curve, not a line. Sleep too little, your health composite score (built from depression, chronic conditions, subjective health, and overall wellbeing) drops. Sleep too much, it drops again. There’s a sweet spot in the middle, and it’s a real, statistically robust feature of the data within every single country in the sample.

But the position of that sweet spot moves. The researchers found a turning point, the amount of sleep associated with peak health, for each of the 20 countries individually, and those turning points differed significantly from one another. The optimal number isn’t one number. It’s twenty numbers, one per culture, and they don’t converge.

What did converge, across every country studied, was something else entirely: the gap between how much people actually slept and where their personal curve peaked. In every country, average sleep duration fell short of the turning point. Everyone, everywhere, is sleeping somewhat less than their own culture’s apparent optimum. The shortfall is universal. The optimum is not.

There’s a second result buried in here that’s arguably more interesting than the headline finding, and it has nothing to do with hours. The researchers asked each participant not just how long they’d slept, but what they believed their cultureconsidered an ideal amount of sleep. Then they measured the gap between a person’s actual sleep and their own estimate of that cultural ideal. People whose sleep was closer to what they believed their culture expected, regardless of whether that was six hours or eight, reported better health. The effect held up even after controlling for the raw number of hours slept.

In other words: it’s not just that six hours works for some places and eight works for others. It’s that matching the local norm, whatever that norm happens to be, carries its own independent health signal. The researchers floated a few explanations. Maybe people feel subjectively healthier when their habits feel normal. Maybe there’s friction, low-grade and cumulative, in being out of step with everyone around you (worrying about missing the early train, structuring your evening around a schedule nobody else keeps). Maybe it’s something more biological: people whose sleep architecture doesn’t fit their environment may be, for reasons unrelated to the hours themselves, less healthy to begin with, and the correlation runs the other direction. The data can’t distinguish between these, and the authors are upfront that it’s correlational throughout. But the fact that “fit” predicts health independently of “amount” is the kind of finding that quietly reframes the whole question.

The View From Three Million Years Back

None of this happens in a vacuum, obviously, and one of the more useful frames for thinking about why a six-hour average and an eight-hour average can both sit at the top of their respective curves comes from outside the PNAS paper entirely.

David Samson, an evolutionary anthropologist at the University of Toronto, has spent years studying sleep across the primate order, lemurs, orangutans, chimpanzees, and eventually humans themselves, including extended fieldwork living alongside the Hadza in Tanzania and the BaYaka in the Republic of the Congo. His phylogenetic models, built from sleep data across more than 30 primate species and controlling for body size, brain size, social structure, and terrestriality, generate a prediction for how much Homo sapiens “should” sleep given our biology: about 11.5 hours per 24-hour period.

We sleep, on average, about seven.

That’s not a small discrepancy. Owl monkeys sleep up to 17 hours. Tarsiers manage 15. Lemurs sit around 13 to 14. Great apes, our closest relatives, average somewhere between 9.5 and 10. Humans are the outlier of the entire order, the primates who sleep the least, by a wide margin, relative to what their biology would predict.

Samson’s argument, laid out in his book The Sleepless Ape,2 is that this isn’t a deficit. It’s the result of a real evolutionary shift, one he dates to roughly 1.8 million years ago, when Homo erectus began building shelters. Once you have a controlled sleeping environment, natural selection has room to start trimming non-REM sleep, gradually, over hundreds of thousands of years. At the same time, the advent of cooking with fire collapsed the daily chewing budget. Chimpanzees spend five to six hours a day chewing raw food. Gorillas spend up to eleven. Cooked food cut that down to roughly an hour for humans. Between the sleep reduction and the chewing reduction, Samson estimates our ancestors freed up something on the order of four extra hours a day, time that could go toward toolmaking, social bonding, teaching, and the kind of cumulative culture that no other primate manages at scale.

The “human sleep paradox” is that we’re the short-sleeping primate who also lives the longest and thinks the hardest. Samson’s framing is that the short sleep isn’t despite our cognitive advantages. It’s bound up with how we got them.

Where the Stories Meet, and Where They Don’t

Here’s where it gets genuinely interesting, because the two pictures, the PNAS cross-cultural data and Samson’s evolutionary one, line up in one place and pull apart in another.

They agree on the headline: humans sleep less than the textbooks have generally assumed they should, and it’s not a crisis. The widespread narrative of a modern “sleep deprivation epidemic,” driven by phones and stress and artificial light, gets undercut from two completely independent directions. The PNAS data shows no health penalty for nations that sleep less. And Samson’s fieldwork found something that should be more alarming to that narrative than it usually gets credit for: small-scale societies like the Hadza and the BaYaka sleep less than industrialized populations, not more, averaging around 6.4 hours, with sleep efficiency around 70%, well below the 85% the National Sleep Foundation considers high quality. If anyone should be sleeping “naturally,” free of screens and shift work and 11pm emails, it’s hunter-gatherers. And they’re sleeping worse, by the conventional metrics, than people in Tokyo or Toronto.

So why aren’t they falling apart? Samson’s answer points toward circadian alignment rather than duration: groups like the Himba, who he describes as averaging around four and a half hours of sleep a night, show solid cardiovascular and mental health markers, which he attributes to their internal biological clocks being tightly synchronized with their actual environment, light, temperature, activity, in a way that industrialized sleepers, insulated by climate control and artificial lighting, generally are not.

This is where the PNAS finding about “cultural fit” starts to look less like a soft psychological add-on and more like it might be pointing at the same underlying mechanism from a completely different angle. The PNAS researchers measured fit to a perceived social norm, what your culture expects. Samson’s framework is about fit to a physical environment, what your biology expects. These aren’t the same thing, and the paper doesn’t make this connection, doesn’t even gesture at Samson’s work at all. But it’s hard not to wonder whether “matching your culture’s sleep norm” and “matching your environment’s light and temperature cycle” are, in many traditional societies, simply the same variable measured twice. The social schedule and the solar schedule used to be the same schedule. In a lot of the modern world, they’ve come apart, and you’re free to match one without the other.

Where the two pictures genuinely diverge is on what counts as the unit of explanation. Samson’s framework is a species-level story: humans, as a species, evolved to need less sleep than the primate baseline would predict, full stop, and the explanation is fire and shelter and a few hundred thousand years of selection pressure. The PNAS data doesn’t dispute that humans sleep less than other primates, nobody’s claiming we should be at 11 hours, but it insists that even within the human range, “how much” isn’t settled by species-level biology alone. The turning points for the health curve differ by a measurable, statistically significant amount across 20 countries that share the same evolutionary history. Whatever Samson’s 1.8-million-year story explains, it doesn’t explain why Japan’s optimum and France’s optimum land somewhere different. That gap is being filled by something that operates on a much faster timescale than natural selection, something closer to culture, climate, light exposure, work schedules, the things that differ between Tokyo and Paris but not between Homo sapiens in Tokyo and Homo sapiens anywhere else.

Latitude turns out to be one of the few variables that predicts sleep duration with any consistency across both studies, longer sleep further from the equator, which the PNAS authors note replicates earlier work. But latitude alone doesn’t explain the turning points, and it doesn’t explain why “fit to your culture’s expectation” carries an independent health signal on top of the raw hours. There’s a gap here, between what the species-level evolutionary story explains and what the population-level cultural story describes, and as far as either piece of work goes, nobody’s filled it yet.

What both perspectives share, in the end, is a quiet correction to a piece of received wisdom: that there’s a number, and the number is the same for everyone, and falling short of it is a failure of modern life. The PNAS data says the number depends on where you live and what your neighbors expect. Samson’s evolutionary framing says the number depends on what your species did with the time it freed up by needing less of it in the first place. Neither one says seven hours is wrong. They just disagree, interestingly, about what “right” would even mean.

The team behind the study,1 led by Serena Tucci’s lab at Yale, found evidence for introgression from three genetically distinct Denisovan-like lineages into the ancestors of Near Oceanians. Not one Denisovan population contributing DNA at different points in time, but three separate groups, each with a measurably different genetic affinity to the only Denisovan genome ever sequenced from a fossil, the Altai individual from Siberia. East Asians, by comparison, carry signatures of just two such pulses. Whatever “Denisovan” actually denotes, in genetic terms, it now looks less like a single population and more like a loose federation of related but separate lineages, scattered across Asia, each leaving a different trace depending on who their descendants happened to meet and interbreed with.

This finding didn’t come cheap. Near Oceania has been one of the most persistently underrepresented regions in human genomics, despite harboring some of the deepest population history outside Africa. The region was settled around 42,000 years ago and then largely left alone, geographically and demographically, for tens of thousands of years. The new dataset, 177 high-coverage genomes sequenced to a median depth of over 31x and analyzed alongside 1,284 genomes from populations worldwide, gave the researchers enough resolution to detect signals that smaller, earlier studies simply couldn’t see.

What they recovered was a genuinely enormous amount of archaic sequence. Altogether, the team reconstructed 1.897 billion base pairs of introgressed DNA spanning over 70% of the parts of the genome where such sequence can reliably be detected. More than a quarter of that, some 505 million base pairs, had never been documented before. And of the Denisovan-derived sequence specifically, the total came to 831.9 million base pairs, nearly three times what had been catalogued previously, with most of it found in the newly sequenced Oceanic samples. Sepik individuals from New Guinea carried the most of any population sampled, with roughly 25 times more Denisovan sequence than is typical in East Asian genomes.

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Those plant remains just became the most informative objects in the burial.

A new study1 by Dominika Sieczkowska-Jacyna and colleagues took three short-lived botanical samples from the Maiden’s grave goods, coca leaves, manioc seeds, and maize, and ran them through radiocarbon dating alongside a battery of isotope measurements. The goal was straightforward: get a tighter date on when the capacocha ritual at Llullaillaco actually happened. The previous estimate, based on radiocarbon dating of the children’s hair back in 2007, had placed the event somewhere between 1430 and 1520 CE. That’s an 90-year window, which in practical terms means it covers almost the entire span of documented Inca presence in the region. You can’t build an argument about why something happened politically if your date for when spans three or four successive rulers.

The new analysis narrows that window to 1462–1507 CE, with a statistical center of gravity around 1499. And the way the researchers got there is, frankly, a more interesting story than the date itself.

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“It was obvious that this was not just any find, but a special one,” he later said. He told his field team something simpler in the moment: “Here we have an article.1”

What they’d found were chuño, freeze-dried potatoes, and they were roughly 500 years old. Only a handful of archaeological examples exist anywhere, and the last comparable discovery was made more than a century ago, at Pachacamac. The Tambo Viejo chuños are not just old food. They’re physical evidence of one of the Inca state’s most underappreciated logistical achievements: moving a fragile, high-altitude crop across hundreds of kilometers to a desert coastline, and keeping it edible for centuries afterward.

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That’s the thing you need to sit with for a moment. Not the writing question, not the calendar question, but the strangeness of the object itself. A human body, breasts and navel rendered with care, and then above the chest — nothing recognizable. Just a tab of clay, blank except for those eleven pressed marks.

More than 300 of these “tab” figurines have been found at La Blanca over decades of excavation. Julia Guernsey, Stephanie Strauss, and Michael Love, the team behind a new study published in Latin American Antiquity,1 have worked through the site’s figurine assemblage long enough to know that the tab form was deliberate, meaningful, and consistent. Tabs sometimes have earspools. Some have headbands. The absence of a face was not a failure of craft. It was the point. The projecting tab, devoid of prescribed features, may have functioned as a kind of blank slate — a head freed from fixed identity, open to other kinds of marking.

Only one La Blanca figurine, of the several thousand found, was ever marked with dots like these.

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Her brain was removed. The base of her skull shows a fracture pattern inconsistent with any known accident: not a fall, not a collapse, not a drop from a height. The break radiates across the right occipital bone in a way the researchers who reanalyzed her remains describe as most consistent with an intentional targeted impact. Whether that blow came at or just before death is unclear. What happened next is somewhat easier to read. The interior surface of her frontal bone carries straight, parallel striations — fine incisions running across the inside of her skull, made with a sharp implement while the bone was fresh. Brain removal, probably shortly after death.

Then her long bones were worked. Both humeri, the left ulna, the left femur: all present in the grave as fragments, roughly half their original length. They weren’t gnawed. The cut surfaces don’t match rodent activity. Instead, the cortical bone has been stripped back and the exposed inner material whittled to a sharp, pointed end. One femoral fragment shows something more: a flat, smoothed margin at the tip, as if the point had been pressed and worn against another surface. Use-wear, on a human thighbone.

After all of this, every modified bone was laid back into anatomically correct position within a low stone cairn on the Durness Peninsula, at the far north-western edge of the Scottish mainland. Reassembled. Deliberate.

The site is called Loch Borralie. The woman — Individual 1 in the published analysis by Laura Castells Navarro and colleagues at the University of York, published in Antiquity1 — was probably over thirty years old at death, most likely female based on ancient DNA. Beside her, slightly later in the stratigraphy, lay a juvenile of about fifteen. These are the only two bodies found in the cairn.

A body between worlds

One of the persistent puzzles of Iron Age Britain is that most people, archaeologically speaking, simply disappear. Formal cemeteries with tidy inhumations are rare; the period runs roughly from 800 BC to the Roman conquest in AD 43, and across most of that span and most of that geography, archaeologists struggle to find the dead at all. The favoured interpretation is that excarnation or exposure was common — bodies left to decompose, scatter, return to the landscape — leaving little trace.

What survives tends to be stranger. Human remains turn up under house floors, in grain storage pits, at settlement boundaries. Not buried so much as incorporated. The dead, in this reading, remained active within the world of the living: their bones kept, circulated, modified, deployed. North-west Scotland and the Northern and Western Isles preserve the clearest evidence for this, partly because the environmental conditions are good for bone survival. Mummification has been identified at Cladh Hallan on South Uist. Modified bones — perforated skull fragments, bones worked into objects — appear across Atlantic Scotland with enough regularity that they constitute a pattern.

Individual 1 at Loch Borralie fits somewhere in this tradition, though her treatment goes beyond most parallels. The closest single analog for her modified long bones comes from Wag of Forse in Caithness, where a human femur worked to a point — showing extensive wear, polish, and red staining — had been placed under the entrance of an Iron Age roundhouse. Another worked femoral fragment, polished through use, came from a ditch at Fairfield Park in Bedfordshire. The Loch Borralie bones predate the Caithness example by several centuries, but the practice appears consistent enough to suggest a tradition rather than an anomaly.

What the bones were used for is genuinely unknown. The team is careful not to overclaim. Brain removal could reflect cannibalism, but there’s no evidence of the long-bone processing for marrow extraction that typically accompanies it. It could reflect a practice of cleaning and preserving the skull for curation or display — something attested elsewhere in Iron Age contexts. The worked long bones may have functioned as implements of some kind; the femoral wear suggests actual use, but the other three modified bones show no comparable signs. And then, after whatever period of use or curation, the whole assemblage was laid out correctly, bones in their right places, and covered by stone.

The team’s interpretation, offered cautiously, is that this woman’s remains were held and processed for an interval before final deposition. The care of the reassembly, the anatomical precision of the arrangement, suggests reverence rather than disposal. The degree of handling implies sustained engagement, not a single perimortem event.

The juvenile beside her — Individual 2, male, around fifteen — shows none of this complexity. His skeleton is poorly preserved, only about a quarter surviving, and his skull had eroded out of the cairn entirely by the time excavators arrived in 2000. His bones carry signs of developmental disruption: enamel hypoplasia indicating periods of malnutrition in childhood, possible vitamin C deficiency, two fused cervical vertebrae likely congenital. He was not treated after death the way the woman was. His burial is, by comparison, ordinary.

Where they came from, and who they were

The two individuals are related. Their mitochondrial haplogroup — T2b30 — is otherwise unattested in any published ancient individual from Britain. Sharing it almost certainly means shared maternal ancestry. The team’s identity-by-descent analysis, which detects shared DNA fragments too small for standard relatedness algorithms to reliably identify, found four shared segments totaling over 43 centimorgans. The longest runs to about 12 cM, consistent with a fifth-degree or more distant relationship. Given their approximate ages at death, their matching radiocarbon dates placing both deaths between roughly 50 BC and AD 70, and that rare mitochondrial signature, the most probable relationship is second cousins through a shared pair of great-grandparents.

That’s a meaningful connection, but it’s not a parent-child pair, not siblings. They were kin in the way that members of a dispersed extended family are kin — connected, probably known to each other, but not necessarily cohabiting.

Neither of them grew up at Loch Borralie. The isotope signatures preserved in their tooth enamel — strontium, oxygen, sulphur — point consistently toward a coastal upbringing: high strontium concentrations comparable to Iron Age communities on Orkney and the Western Isles, sulphur values typical of coastal populations. The oxygen values narrow this further, excluding western Britain and northern Scotland, pointing instead to a stretch of the east Sutherland coast between roughly modern Helmsdale and Golspie, around 80 kilometers southeast of where they were buried. Individual 1’s enamel reflects her diet and environment between roughly 7.5 and 17.5 years of age; Individual 2’s goes back to toddlerhood. Both signals point the same direction.

The journey from that east coast to Loch Borralie is not trivial. Overland, across the Highlands, it takes several days on foot. By sea, it means navigating the Pentland Firth, one of the most challenging stretches of water in Britain. They likely traveled together, possibly as part of a larger group. They died within decades of each other. And they were buried in the same cairn, though probably not at the same time — the juvenile’s grave cut sits stratigraphically above the woman’s initial deposit.

The genetic picture extends considerably further than the two of them. Identity-by-descent analysis revealed that both individuals share DNA fragments with people buried in Orkney. Individual 1 is genetically related — distantly, perhaps eighth degree or beyond — to a man buried at the Atlantic roundhouse site of Bu, dated to between roughly 400 and 200 BC. That’s at least 150 years before the Loch Borralie woman’s death: possibly a direct ancestor, or the collateral relative of one. Individual 2 connects to a person from Knowe of Skea in Orkney, dated slightly later, broadly contemporary with the Loch Borralie burials.

Both Orcadian individuals, in turn, share distant genetic ties with a man buried in a rubble cairn on a storm beach at Applecross, on the west coast of Scotland, roughly 140 kilometers southwest of Loch Borralie. That site contained the remains of at least six adult males, deposited periodically from the second century BC to the third century AD. The Applecross man is roughly contemporary with the Loch Borralie individuals.

The network this traces runs approximately 265 kilometers, from Applecross in the south to Knowe of Skea in the north, with the Loch Borralie individuals positioned at a kind of geographic midpoint. The people connected by this web almost certainly did not know each other. Many of these biological links bridge generations, even centuries. But as the researchers point out, distant IBD relationships are less a window into personal kinship than a proxy for the movement of people across landscapes and seaways over time. The genetic signal persists long after direct knowledge of family connections would have faded.

What makes this coherent is the shared maritime geography. All of these sites sit on or near the sea. The broch towers that characterize the Iron Age archaeology of Atlantic Scotland — those distinctive drystone roundhouses rising sometimes to ten meters or more — show strikingly similar construction techniques and architectural forms from Shetland to the Western Isles. Shared material culture across a wide coastal arc has always implied connection; the genetic and isotopic data now supply some of its human content. People moved between these communities, carrying whatever they carried — biological ancestry, cultural practices, possibly the bodies of their dead.

The team suggests that the pattern of burial itself — individuals deposited in accumulating rubble cairns or within the ruins of earlier buildings, periodically, over generations — may represent a coherent funerary tradition that has previously gone unrecognized simply because its archaeological footprint is so modest. The cairn at Loch Borralie, the Applecross storm beach, the roundhouse rubble at Bu and Howe of Howe and Knowe of Skea: structurally similar, genetically linked, spread across the northern Scottish seaboard. Not random. A practice with a geography.

The woman at the center of it — reassembled, carefully arranged, her worked bones returned to their anatomical places — remains the hardest part to interpret. Whatever was done to her and with her before that final deposition, the ending looks like care. The people who placed her there knew where every bone belonged.

Further Reading

• Shapland, F. & Armit, I. 2012. The useful dead: bodies as objects in Iron Age and Norse Atlantic Scotland. European Journal of Archaeology 15: 98–116. https://doi.org/10.1179/1461957112Y.0000000004

• Parker Pearson, M. et al. 2021. Cladh Hallan: roundhouses and the dead in the Hebridean Bronze Age and Iron Age, part 1: stratigraphy, spatial organisation and chronology. Oxford: Oxbow.

• Evans, J.A. et al. 2012. A summary of strontium and oxygen isotope variation in archaeological human tooth enamel excavated from Britain. Journal of Analytical Atomic Spectrometry 27: 754–64. https://doi.org/10.1039/C2JA10362A

• Armit, I. & Büster, L. 2020. Darkness visible: the Sculptor’s Cave, Covesea, from the Bronze Age to the Picts. Edinburgh: Society of Antiquaries of Scotland.

On the other side of the crawl is a chamber roughly 20 meters long. Its west wall bears a panel of black geometric figures drawn in charcoal: triangles, trapezoids, lines. They are striking not because of any naturalistic detail but because of what they share with the nearby Sala de las Pinturas, a more famous and more accessible chamber that researchers have been studying for decades. The stylistic resemblance was noticed before anyone had a date for either site. What was missing, for Sala Keimada, was chronology. That changed with a study published in 2026 in the Journal of Archaeological Science: Reports,1 led by Ana Isabel Ortega-Martínez of the Royal Burgos Academy of History and Fine Arts, presenting 18 new AMS radiocarbon dates for the chamber. The results confirmed what stylistic analysis had long suggested, and then pushed the story much further forward in time.

The oldest date in the dataset, sample SK-1, comes from a small piece of charcoal found on top of one of the finger-fluting engravings at the transition between the entrance crawl and the chamber. It calibrates to approximately 13,500 to 13,700 years before present, placing it squarely in the late Upper Paleolithic. A second sample, SK-2, taken from the charcoal paint forming one of the main black trapezoidal motifs in the chamber itself, calibrates to around 12,750 to 13,200 years before present. The two dates bracket the primary paintings in chronological terms, and they align closely with dates previously obtained for the geometric figures in the Sala de las Pinturas. The two chambers, separated in space and radically different in access difficulty, appear to have been created by the same cultural tradition at roughly the same moment.

This is the rock art tradition scholars classify as Style V, sometimes called Final Paleolithic or Late Paleolithic art, characterized by geometric and semi-abstract forms rather than the grand figurative animals more commonly associated with cave art in the public imagination. Its range spans multiple sites across the Iberian Peninsula and beyond, appearing at La Peña de Estebanvela, Fariseu, Molí del Salt, and Siega Verde, among others.

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But people kept coming back.

Not to live. The evidence doesn’t suggest that. What they left behind is too sparse, too episodic: a scatter of incense burner fragments near a broken stela, a small pile of stacked stone, offerings pressed close to monuments that had been standing (or leaning, or fallen) for centuries before anyone visited again. These aren’t the traces of inhabitants. They look like the traces of pilgrims.

A new study1 by Victoria Ingalls and Brett Houk, published in Latin American Antiquity, adds two more sites to the accumulating picture of this Postclassic ritual landscape. At Kaxil Uinik and Ayiin Winik in northwestern Belize, excavations have turned up Late Postclassic offerings associated with reset Classic-period stelae — and, at Ayiin Winik, something that hadn’t been documented in this region before: an actual altar, built from scavenged limestone blocks, still surrounded by the ceramic fragments left on and around it.

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What changed was the technology. In 2025, a team led by Kenichiro Tsukamoto of the University of California, Riverside, ran a high-resolution 3D scanner — an Artec Spider II, accurate to a tenth of a millimeter — glyph by glyph across the face of Stela 46.1 The device has its own lighting system, eliminating the shadows and flares that had made traditional raking-light photography so unreliable on badly eroded surfaces. Software then allowed the team to illuminate the resulting digital models from dozens of angles simultaneously, revealing the faint contours of carved numerals that centuries of weathering had nearly erased.

What emerged was a Long Count date: 8.7.1.0.0, corresponding to August 31, A.D. 180 in the Gregorian calendar.

That date is currently the earliest known Long Count in the Maya lowlands. It pushes the record back by more than 112 years from the previous holder, Stela 29 at Tikal, which dates to A.D. 292. But the bare chronological priority is almost the least interesting thing about it.

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The site is Vráble-Veľké Lehemby, in the Nitra District, and it belongs to the Linear Pottery culture — the Linearbandkeramik, or LBK — the earliest farming tradition to spread across central Europe. Researchers from Kiel University and the Slovak Academy of Sciences have been excavating it since 2012. The settlement itself is substantial: at least 313 houses, grouped into three spatially distinct neighbourhoods, occupied roughly between 5250 and 4950 BCE. One neighbourhood is enclosed by a double ditch 1.3 kilometres long with at least six entrances. The headless skeletons were found in that ditch, concentrated near one of its entrances, at the bottom of the outer earthwork.

What has accumulated since fieldwork expanded in 2022 is now the subject of a paper by Martin Furholt and colleagues published in the Proceedings of the Prehistoric Society.1 The find is extraordinary not just for the numbers — 77 headless individuals, with only a single child’s skeleton still possessing a skull — but for what it resists. The first instinct, understandably, is to reach for the massacre explanation. That instinct, the researchers argue, is probably wrong.

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A team led by researchers at Toho University and the University of Tokyo has now done exactly that for a substantial collection of skeletal remains drawn primarily from Edo-period Japan (1603–1868), comparing the results against modern Japanese dental calculus and previously published samples reaching back to the Final Jomon period, around 1000 BCE. The study, published in Scientific Reports,1 recovered oral microbial DNA from 118 ancient individuals excavated from sites across Tokyo, Saitama, Yamanashi, Fukuoka, and Okinawa. What they found complicates any simple narrative about the deep stability of human-associated microbes. The oral microbiome, it turns out, has been changing alongside us — shaped not only by diet and disease, but by the particular texture of historical circumstance, including practices we would not normally think of as biological at all.

The most striking of those practices involves an archaea called Methanobrevibacter oralis.

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The stone tools from GBY have been studied in detail. The basalt assemblage in particular, handaxes and cleavers shaped from large flakes struck off massive cores, tells a story of technical sophistication. The reduction sequence is not simple: a hominin had to identify a suitable basalt slab, work it into a giant core sometimes weighing more than 20 kilograms, detach a large flake, and then shape that flake into a finished biface. Earlier analyses of the GBY assemblage showed that most of this knapping didn’t happen at the site itself. The flake counts don’t add up. There are far too few debitage pieces relative to the number of finished tools, which means the initial reduction stages happened elsewhere, probably where the raw material was obtained, and the finished or near-finished tools were carried in.

But where, exactly, was the basalt coming from? That question turns out to be harder than it sounds.

The Jordan Valley is tectonically active. The Dead Sea Transform has been faulting, tilting, subsiding, and eroding the landscape for millions of years. Basalt flows that were exposed at the surface 780,000 years ago may be buried under tens of meters of sediment today. Flows that exist as outcrops now may represent only a fragment of what was once available. Reconstructing a Pleistocene raw material landscape from what you can see at the surface is a bit like trying to understand a library by examining the books that survived a flood.

A new study1 by Tzahi Golan, Yoav Ben Dor, and Naama Goren-Inbar addresses this problem directly by going underground.

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The Fetter family happened to know a graduate student in Kent State University’s anthropology department. By the next morning, archaeologists were on site. Within that same small patch of ground, excavation revealed two more bifaces buried roughly five centimeters below the first nine. Below them, in the sediment, were flecks of charred wood.

The final count: eleven stone bifaces, now known as the Joshua Cache, donated to the Cleveland Museum of Natural History and the subject of a study published in 2026 in the Journal of Archaeological Science: Reports1 by Eren and colleagues.

What the team found when they looked closely at these tools is genuinely puzzling. And the puzzle has layers.

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