Research integrating genetics and archaeology reveals that diverse East Asians derive ancestry from a shared lineage that split over 40,000 years ago. This ancient lineage contributed to the development of modern languages, including Sino-Tibetan and Japonic families.
Strong social bonds increase willingness to join others in battle, according to a study by Max Planck Institute researchers. The study found that males and females participate in battles, and that three factors – group size, maternal kin involvement, and non-kin social bond partners – increase the likelihood of participation.
Researchers found that present-day Mariana Islanders' ancestry is linked to the Philippines, suggesting an Island Southeast Asia origin for the first settlers. The study also suggests a close link between Guam skeletons and early Lapita individuals from Vanuatu and Tonga.
Scientists identify a 34,000-year-old Early East Asian fossil with mixed Eurasian descent, showing a quarter of its ancestry came from western Eurasians. The study found that the individual's DNA contained segments from extinct hominins, including Denisovans and Neandertals.
Researchers found that male chimpanzees who lose their mothers early in life are less competitive and have fewer offspring. Chimpanzee mothers provide support throughout prolonged childhood years, which is likely a trait shared with humans six to eight million years ago.
Chimpanzees exhibit diverse behaviours across various contexts, including tool use, foraging on insects and honey, and thermoregulatory habits. Environmental variability is positively associated with behavioural and cultural diversity, suggesting that species adapt to uncertainty through mechanisms like innovation and cognitive capacity.
The study reveals the oldest mitochondrial genome of a Neanderthal found in Central-Eastern Europe, dating back ~80,000 years. Genetic analysis shows a strong connection between Poland and the Northern Caucasus, shedding light on Neanderthals' adaptability and biology.
A study discovered that some people in Europe and South America carry a Neandertal variant of an ion channel gene, leading to increased pain sensitivity. The gene's variant is associated with a lower pain threshold compared to the modern human version.
A study in Côte d'Ivoire found that preferences for bushmeat vary widely among hunters, traders, and consumers, driven by factors such as nutritional needs, cultural practices, and economic incentives. The researchers urge policymakers to prioritize targeted conservation strategies that account for individual motivations and user groups.
Researchers found that chimpanzees are more motivated to cooperate and warn others than bonobos, who rely less on each other. This suggests that the interdependence hypothesis may be supported, where humans' reliance on cooperation evolved from hunting large prey or conflict with other groups.
A recent study by Max Planck Institute researchers used stem cells and organoids to analyze the role of Neandertal DNA in human development. The team found that archaic DNA is present in nearly all modern humans outside Africa, with certain genes associated with skin and hair color being highly prevalent in Europeans.
A Neandertal fossil found in Chagyrskaya Cave suggests that the species may have lived in small groups of less than 60 individuals. The study's findings also suggest a unique role for the striatum region of the brain in Neandertals, potentially influencing cognition and behavior.
A new study found that high levels of emotionality and conscientiousness are indicators for stockpiling behavior. The survey of 1,029 adults from 35 countries revealed a strong link between perceived threat posed by the pandemic and toilet paper consumption.
In western chimpanzees, females play a crucial role in territorial behavior, cooperating with males to maintain borders and engage in conflicts. Larger groups gain advantages over smaller communities through access to larger territories and reduced neighbor pressure.
Researchers found 38 distinct technical elements in chimpanzee termite fishing, with individuals sharing common elements among communities. This study expands our understanding of chimpanzee culture, highlighting the complexity and diversity of their social behaviors.
Researchers mapped developmental milestones in wild chimpanzees, finding gross motor skills emerge at 4 months, while fine motor skills appear at 15 months. The study suggests that extended development is necessary for acquiring adult skills, similar to humans.
New discoveries at Bacho Kiro Cave in Bulgaria reveal the earliest evidence of Homo sapiens in Europe, with fossils dating back to 45,820 years ago. The findings indicate that Homo sapiens arrived in Europe and interacted with Neanderthals, bringing new behaviors and tools.
A three-million-year-old brain imprint reveals that Australopithecus afarensis infants may have relied on caregivers for a prolonged period. The study found no evidence of human-like brain reorganization, but suggested protracted brain growth similar to modern humans.
Scientists have developed a new method using zinc isotope analysis to determine the diet of fossil vertebrates. The study found that the ratio of special zinc isotopes in dental enamel can identify whether an animal was a herbivore, carnivore, or omnivore.
Researchers measured brain asymmetry in humans and great apes, finding a shared pattern in brain shape and connectivity. Humans exhibited greater variability in brain asymmetry than expected, suggesting increased functional modularization.
A study on wild chimpanzees found that offspring who lost their mother after weaning had less muscle mass, while mothers of high social status produced offspring with higher muscle mass. Even without direct provisioning, mothers' presence and influence food consumption in their offspring's lives.
Female chimpanzees' reproductive success decreases when neighboring groups exert high pressure on their territory, leading to longer intervals between births. High neighbor pressure also negatively affects offspring survival, suggesting that stress from competition triggers physiological responses in gestating females.
Researchers recreated the emergence of language in deaf communities by challenging children to communicate with each other without spoken language. They found that children invented signs for abstract concepts and gradually developed grammatical structures, demonstrating that communication cannot be reduced to words alone.
Researchers found that monkeys in large social groups don't call out to specific kin or friends when threatened, but rather broadcast the location of the threat to the general public. This allows individuals to minimize their risk while still providing warning to others in the group.
Leipzig researchers have initiated a global primate study project, ManyPrimes, to address fundamental evolutionary questions. The first study focused on short-term memory in primates, with almost 180 animals from 12 species participating across 11 research stations.
Researchers analyzed human and chimpanzee cerebral organoids to understand dynamic gene expression and regulation in early brain development. They identified human-specific gene expression patterns and developmental differences in the adult prefrontal cortex.
In western lowland gorillas, females must balance the risks of staying with a protective silverback versus transferring to another group to avoid reproductive costs. Female gorillas that transfer multiple times experience longer intervals between births, leading to fewer offspring over their lifetime.
Research at a bonobo community found that female-female sex increased oxytocin levels, promoting social bonding and cooperation. This suggests that same-sex interactions may play a crucial role in maintaining high levels of cooperation among female bonobos.
Researchers discovered a remarkably complete 3.8-million-year-old cranium of Australopithecus anamensis in Ethiopia, revealing new insights into human evolution. The fossil finds contradict the long-held notion of a linear transition between A. anamensis and its descendant species A. afarensis.
Observational fieldwork provides valuable insights into evolutionary function, conditions for cognitive skill employment, and brain plasticity. Janmaat's five-step guideline guides scholars in studying cognition in wild animals through a suite of behaviours and statistical models.
Western gorillas in Gabon have been observed cracking open nuts with their teeth, despite their lack of adaptations for hard object consumption. The study reveals that gorillas may be capable of more dietary breadth than previously thought, with implications for understanding human ancestors' diets based on tooth shape.
A study by Max Planck Institute for Evolutionary Anthropology reveals that humans and chimpanzees travel with different linearity when approaching out-of-sight food locations. Humans tend to have higher linearity in familiar areas, while chimpanzees exhibit the opposite pattern.
Researchers found high densities of flies in primate social groups, recapturing marked flies up to two weeks later. Flies carried anthrax and Treponema pallidum pertenue bacteria, which cause severe lesions in mangabeys.
Infanticide by female mammals removes potential competitors for breeding space, milk, and social status. Researchers found that harsh conditions and territorial needs drive this behavior in various mammalian species.
Researchers have retrieved nuclear genome sequences from ancient Neandertal fossils, providing a unique glimpse into the early history of European Neandertals. The study reveals that these ancient individuals were more closely related to later Neandertals in Europe than to those in Siberia, shedding new light on human migration patterns.
Chimpanzees use percussive technique to gain access to meat of inaccessible reptiles, exhibiting intelligent behavior. They plan for future needs, such as hunger, in a surprising display of cognitive flexibility.
Researchers found that bonobo mothers aid their adult sons in copulation efforts, protecting them from other males and giving them access to popular spots within social groups. This behavior, rare in chimpanzees, is linked to higher male fertility and reproductive success for the bonobos.
The Xiahe mandible, discovered on the Tibetan Plateau, is at least 160,000 years old and shares anatomical features with Denisovans from Denisova Cave. The ancient proteins found in the mandible indicate a hominin population closely related to Denisovans.
A new study led by Murray Cox has found that modern Papuans carry hundreds of gene variants from two deeply divergent Denisovan lineages, separated for 350,000 years. The research reveals a complex history of interbreeding between modern humans and archaic hominins in Island Southeast Asia.
Male chimpanzees exhibit increased urinary cortisol levels during unstable dominance periods, indicating psychosocial stress despite lower aggression rates.
Researchers found that bonobos reacted more strongly to camera traps than chimpanzees, while younger apes were more curious and explored them longer. The study highlights the need for scientists to consider animal responses to unfamiliar monitoring equipment in their natural habitats.
Researchers found that chimpanzee behavioral diversity is reduced by 88% in areas with high human impact, indicating a loss of cultural traditions and social learning opportunities. This study highlights the need to protect animal behavioral diversity as part of biodiversity conservation efforts.
Researchers found that increased dust loads result in decreased chewing efficiency in chimpanzees. The consumption of dust-covered foods created micrometer-scale surface texture features on cheek teeth, leading to larger mean fecal particle sizes.
Researchers document a new 'behavioral realm' in Eastern chimpanzees of the Bili-Uéré region, characterized by novel tool use and expanded food processing technologies. This discovery sheds light on the likely incipient traditions of early hominin ancestors and highlights the importance of studying intact ape cultures.
New research using compound-specific isotope analysis reveals that Neandertals had a predominantly carnivorous diet, primarily consisting of large herbivores. The study also sheds light on the possibility of late weaning and cannibalism in Neandertal populations.
In a study comparing chimpanzees and humans learning the same nut-cracking technique, chimpanzees acquired the skill more rapidly and reached adult efficiency earlier. The study found that teaching facilitated the acquisition of complex behaviors in both species, contradicting the assumption of human superiority in tool use.
Researchers found that left-branching language speakers outperformed right-branching language speakers in recalling initial stimuli across verbal and non-verbal working memory tasks. This suggests that the language structure affects the way native speakers process, store, and retrieve information.
Researchers discovered that bonobos have shorter vocal folds compared to chimpanzees, resulting in lower-pitched voices. This unexpected finding suggests that bonobos use their voice pitch to signal tolerance and non-aggressive interactions with other bonobos.
Researchers found that humans can identify parent-offspring resemblance from infancy, but it becomes more accurate with age. This study suggests that the ability to recognize kinship may be linked to increased facial similarity with parents before puberty.
Researchers studied food sharing in Tai chimpanzees and found they favor friends over strangers, rewarding cooperation