Researchers at Ngamba Island found that chimpanzees hold back from stealing from their friends, and the thieves seemed to know it.

A 12-year study of wild Sumatran orangutans finds that most of what looks like an infant’s solo trial and error starts with watching another ape.

Across 83 cases of infant corpse carrying, nothing about how long chimpanzee and bonobo mothers carry requires them to know death is permanent.

At Dindefelo, Senegal, camera traps caught savanna chimpanzees handing tools to infants and others, and in all but one case the recipient reached first.

A brain-scan study of humans, chimpanzees, and macaques finds the neural hub for self-awareness shifted from the insula to the cingulate cortex.

A phylogenetic analysis of 77 species finds no signal from brain size or group size, and a strong one from the interaction between body mass and life in the trees.

A wild monkey's flexible midfoot bends almost as much as a chimpanzee's ankle, complicating a key debate about our last common ancestor.

A new endocast study of tarsiers, anthropoids, and their relatives finds that vision, not the frontal lobe, explains why primate brains ballooned over 33 million years

What 427 recorded cases of primates grooming dogs, carrying squirrels and adopting other species reveal about the deep roots of pet-keeping

What a chimpanzee putting its fingers in another’s mouth tells us about the evolution of trust

A fifteen-year study of wild orangutans finds mothers steering toward specific neighbors’ territories days before their infants play, then steering home again after

Why some primate lineages didn’t just catch up in brain size, but kept going

A new comparative study dismantles the long-standing idea that difficult childbirth is a uniquely human burden.

New research on 39 captive primate species finds that what makes apes age slowly is ancient, fixed, and probably invisible to human genetics studies.

A new comparative study finds that the timing structure of laughter has been conserved across all living great apes since before the hominid lineage began to diverge.

The strategies savanna chimpanzees use to harvest army ants look almost identical to what forest populations do — and that’s the surprising part

A new study of wild primates complicates one of paleoanthropology’s oldest claims — and raises a stranger question about what our teeth say about modern life

New research shows that chimpanzee quartets outperform pairs at sustaining a shared resource — and the reason why upends assumptions about dominance and cooperation.

The bones that enable human dexterity appear to have been inherited from a knuckle-walking ancestor.

Neighboring groups, not just rival males, may be shaping sexual size dimorphism across primates

A new open-access dataset assembles 18 years of cognitive experiments from the world’s most-studied great ape population.

A new study on orangutans and chimpanzees suggests the fine-tuning of facial mimicry runs deep in primate evolution

A community of nearly 200 chimpanzees in Uganda split into two rival groups and descended into years of lethal conflict — without ideology, ethnicity, or language.

A newly described Early Miocene ape from northern Egypt suggests the common ancestor of all living apes lived in a region that paleontologists had largely stopped looking.

How a decades-long fight between primatologists says as much about scientific culture as it does about chimpanzee culture

Our brains have a dedicated space for human voices, but it turns out we’ve been keeping the door open for our closest relatives.

New research suggests the vestibular system is not one organ, but two distinct evolutionary modules.

A new comparative study of 100 primate species finds that lethal and mild aggression have decoupled evolutionarily — and that how often a species bickers tells you almost nothing about whether it kill

New mandibular fossils from Colombia push back the earliest evidence of committed leaf-eating in South American primates

A new large-scale study finds that Pan paniscus and Pan troglodytes are equally aggressive — they just hit different targets.

A sanctuary in Zambia accidentally documented something strange about why animals — and maybe humans — copy each other.

A new study tested whether our closest relatives share our ancient attraction to quartz and calcite — and the results are hard to explain away.

A new study scanned the brains of 12 macaque species and found that tolerance, not aggression, predicts amygdala size — and the developmental story is stranger than expected.

New fieldwork from Uganda's Kibale National Park delivers the clearest physiological evidence yet for the "drunken monkey hypothesis" — and what it means for understanding human drinking

A new study on facial mimicry and movement tempo in bonobos opens a window into the deep evolutionary roots of human social behavior.

How a 70-year delay in translation reveals our blindness to what we think makes us human

What Kanzi's pretend play reveals about the deep evolutionary roots of the human mind

A survey of 500 primate teeth shows that marks once linked to ancient human hygiene can form naturally, while a common modern dental problem appears nowhere else in the primate lineage

New experiments reveal that larger, more tolerant chimpanzee groups manage shared resources more sustainably, offering fresh insight into the evolutionary roots of cooperation.

A seven-year study in Mexico shows that spider monkeys do not just search for food. They circulate knowledge about it, using fluid social ties to build a shared mental map of their forest.

What risky chimpanzee play reveals about the deep roots of human care

New research shows that young orangutans inherit a cultural archive of edible plants and animals far too extensive for any individual to discover alone.

A decades-long study of wild chimpanzees in Uganda reveals that lethal conflict, territorial expansion, and reproductive success are more tightly linked than many scientists once believed.

What great apes and humans share about friendship, hierarchy, and the limits of social time

How chimpanzees weighing evidence might push us to rethink the roots of reason

Young chimpanzees build tools, break rules, and may hold clues to how culture first evolved

How Post-Reproductive Female Gorillas Redefine Life, Death, and Social Balance in the Forest

A new study finds that the small grooves once thought to prove “toothpick” use in early humans also appear naturally in wild primates—suggesting a far less cultural, and far more biological.