Articles tagged with Human Evolution
A four-million-year study modelled the glucose needs of humans and their ancestors, finding natural sugars supplied energy for growing brains before cooking made starch-rich foods easier to digest. The research suggests earliest hominins were highly reliant on carbohydrate-rich foods, particularly fruit.
Researchers recovered and analyzed ancient viral DNA from a local community in northern Chile, revealing the strongest direct evidence linking European colonization to the introduction of smallpox to the Americas. The study shows that smallpox evolved in a way that allowed it to spread successfully with minimal adaptation.
Researchers have developed a new technique that pinpoints areas of human DNA inherited from two unknown, ancient ancestors. The study reveals that modern humans interbred with these 'ghost' ancestors and Denisovans in Eurasia around 1.8 million years ago.
Archaeic human parents likely had to provide constant parental care due to deformed head shapes in fossilized humans. Human babies are born less developed than other great apes, requiring specialized care, and this helps explain the origins of cooperative social behaviors.
Researchers analyzed genomic data from over 72,000 Han Taiwanese participants to identify genomic signatures of ongoing natural selection and uncover disease-associated genetic variants. The study reveals that large biobanks can function not only as tools for precision medicine but also as platforms for examining modern human evolution.
A new study led by Durham University suggests that reassuring body contact can improve social tolerance and promote peaceful resource sharing. The research analyzed behaviours of bonobos and chimpanzees and found that individuals who engaged in pre-feeding reassurance spent more time co-feeding alongside others.
New analysis supports the brain lag hypothesis, suggesting that some primate lineages' brain sizes overshot expectations after catching up with body size. This finding implies that large-brained primates may have evolved to form complex social groups for protection.
Researchers at UCL found that some small-bodied primates experience a tight cephalopelvic fit during childbirth due to their large newborn heads. These species, such as American monkeys and bushbabies, have developed adaptations to make the process less difficult, including pelvic expansion or delayed pelvic bone fusion.
A study reveals that the rhythmic structure of laughter has remained constant in all living great apes, including humans, for at least 15 million years. This finding offers unexpected clues to the evolution of human speech, suggesting that sophisticated vocal control is a fundamental building block.
New research found that human body size increased in two stages: initially with early hominins like Australopithecus and later with Homo species, which coincided with changes in diet, movement, and environment. The study analyzed 386 fossils across 21 species of hominins.
A new study found evidence of repeated fire use at Wonderwerk Cave between 1.07 and 1.79 million years ago, revealing that early humans brought naturally occurring fire into the cave and maintained it. The findings provide new insights into how our ancestors first began to harness fire.
A recent study using whole-genome data reveals the complex history of South American Indigenous peoples, with genetic diversity higher in Central America and the Southern Cone. The research also identifies a third wave of migration from Mesoamerica around 1,300 years ago, which challenges previous views about Indigenous groups.
A new study suggests that human right-handedness is rooted in how we evolved to walk upright and developed larger brains. This two-stage process freed hands for fine, lateralized manual behaviors and hardened the bias over time.
A new study found that mental health clinicians prefer evolutionary explanations of anxiety over genetic approaches, believing they provide a more positive outlook and can improve patient willingness to seek help. This shift could lead to more hopeful and therapeutically empowering attitudes towards anxiety treatment.
A study published in Frontiers in Ecology and Evolution found that optimal birth weight for minimal kidney damage during extreme endurance events is around eight pounds. Individuals with lower or higher birth weights may face a greater risk of kidney stress or damage.
Researchers investigated which characteristics of crystals made them fascinating to early humans, using experiments with chimpanzees. The chimps showed a strong attraction to transparent and crystalline properties, suggesting that this attraction may have deep evolutionary roots.
A digital reconstruction of Little Foot's face reveals surprising similarities with Ethiopian fossils, challenging previous assumptions about early human evolution. The study sheds light on the diversity of fossil hominin faces across Africa and highlights the importance of the face in understanding primate adaptation and interaction.
The preference for feeding on humans among certain mosquito species evolved around 1.8 million years ago in response to the arrival of early hominins in Southeast Asia. This finding provides independent evidence supporting the limited fossil record of early hominin arrival in the region.
Researchers found that long-standing mating preferences led to sex-biased interbreeding, resulting in the loss of Neanderthal DNA on X chromosomes. The study reveals a complex social history of human evolution, challenging the idea that survival of the fittest drove human migration.
A study of deep-sea cores suggests that rapid climate swings during the Quaternary Period led to variability in glacial periods, which may have influenced early human evolution. The research found that climate conditions switched from stable warmth to cold chaos around 2.7 million years ago.
A new study published in BioEssays suggests that humans' increased exposure to high temperature burn injuries may have driven notable genetic adaptations, including faster inflammation and wound closure. These traits helped humans survive small to moderate burns but became harmful for large burns.
New research reveals that Indigenous communities in southern Brazil hunted large whales 5,000 years ago, long before previously thought. The study provides strong evidence of active hunting and sheds light on the economies, technologies, and lifeways of postglacial societies along the Atlantic coast of South America.
The study of new hominin fossils from Thomas Quarry I in Morocco reveals an African population near the base of the Homo sapiens lineage. The 773,000-year-old fossils provide insights into the shared ancestry of H. sapiens, Neandertals, and Denisovans.
A new study reveals a deep sequence of archaeological deposits at Leang Bulu Bettue cave in Sulawesi, Indonesia, dating back to at least 8 meters below the current ground surface. This finds suggest that an archaic human species and Homo sapiens may have overlapped in time on the island.
A recent study published by the University of Cambridge ranks species based on their levels of exclusive mating. Humans fall between meerkats and beavers in terms of monogamy rates. The study analyzed proportions of full versus half-siblings across various mammal species, including humans. This approach provides a more direct measure o...
Researchers analyzed DNA of 28 ancient southern Africans, finding 490 modern human-specific genetic variants, including immune system and kidney function genes. These adaptations may be related to human's water-retention and body-cooling system, giving special endurance.
A new study reveals that Homo sapiens evolved in southern Africa for at least 200,000 years, contradicting previous theories. The analysis of 28 ancient genomes found genetic adaptations that shaped the species and unique variants linked to kidney functions and cognitive evolution.
Researchers assign a hominin foot fossil from Lucy's time to a different species, providing evidence that two ancient human ancestors coexisted in the same region. The Burtele foot belongs to A. deyiremeda, which retained an opposable big toe for climbing but likely pushed off with its second digit on two legs.
Researchers reconstructed the evolutionary history of kissing using a cross-species approach and found it evolved in large apes 21.5 - 16.9 million years ago. The study also suggests that Neanderthals likely engaged in kissing, given their shared oral microbes and genetic material with humans.
A new paper argues that modern life has outpaced human evolution, leading to chronic stress and health issues. The researchers suggest that societies need to rethink their relationship with nature and design healthier environments to mitigate these effects.
A study from the University of Victoria suggests that humans can smell testosterone and associate it with dominance. The research found that participants rated men with higher testosterone levels as more dominant than those with lower levels, indicating a link between body odour and perceptions of social status.
Scientists studied Neanderthal DNA to understand how facial features develop and evolve. They found a region of DNA that activates the SOX9 gene, leading to a larger lower jaw in Neanderthals. This discovery sheds light on the genetic mechanisms behind face variation and evolution.
Researchers found that Finnish mothers who had more children during periods of famine lived shorter lives, with each child shortening their mother's lifespan by half a year. The study suggests that reproductive effort can affect human aging under harsh conditions.
The superior colliculus, an ancestral brain structure, enables the brain to distinguish objects from the background and detect relevant stimuli in space. It generates centre–surround interactions independently, allowing for the detection of contrasts, edges, and salient features.
Researchers have discovered how ancient viral DNA influences placenta development and pre-eclampsia, a life-threatening pregnancy disorder. The study identified a gene, EPS8L1, that is overexpressed in placentas from women with pre-eclampsia, providing potential biomarker for early detection.
Anthropologist Michael Gurven challenges youth-obsessed culture by exploring aging's physiological and societal aspects, asserting that evolution designed humans to live at least seven decades. Multigenerational cooperation played a key role in the evolution of a post-reproductive life stage.
A recent study from Harvard John A. Paulson School of Engineering and Applied Sciences uses wearable sensor technology and machine learning to estimate ground-reaction forces in runners. This data can provide insights into performance and injury, enabling the development of devices that deliver real-time feedback to users.
Researchers analyzed ape skulls to find that humans evolved the largest brain size and flattest face among closely related species. This rapid evolution suggests a strong link between cranial structure and cognitive abilities, but social factors may also play a role in human skull development.
A new study reveals that ancient hominids were exposed to lead earlier than thought, up to two million years before modern humans began mining the metal. This exposure may have shaped the evolution of hominid brains, limiting language and social development in all but modern humans due to a protective genetic variant.
A new study analyzed over 12,000 artifacts from three archaeological sites in South China, revealing distinct strategies for producing small, portable, and efficient tools. The findings highlight how human groups used technological innovation to respond to fluctuating environments and shifting population dynamics.
A reanalysis of the one-million-year-old Yunxian 2 skull from China suggests a new branch in the human family tree and a possible link to Denisovans. The study proposes that the split between modern humans, Neanderthals, and this Asian clade occurred much earlier than previously thought.
A genomic analysis of over 1,200 people from across South Africa reveals how colonial-era European, Indigenous Khoe-San peoples, and enslaved people contributed to the modern-day gene pool. European genes were more common in males, while Indigenous genes were more common in females.
Researchers found genetic adaptations underlying survival in hot and dry environments, revealing how natural selection enabled the Turkana to thrive in extreme conditions. The study identified key genes, including STC1, that play vital roles in conserving water and protecting kidneys from waste.
Researchers found that having more older brothers close in age reduces the chances of survival for girls, whereas having more older sisters close in age has a positive effect on both girls and boys. This study highlights the importance of considering sex-specific effects when studying the impact of siblings on human survival.
Researchers argue that culture is driving human evolution, solving problems more rapidly than genetic evolution. Cultural practices adapt faster, allowing groups to adapt to new environments and solve novel problems.
Researchers found genetic adaptations in response to micronutrient shortages and surpluses, particularly in regions with iodine-poor soils. The study provides insights into the impact of micronutrient availability on human evolution, highlighting potential vulnerabilities to deficiencies as climate change affects soil nutrient levels.
Researchers discovered that humans with Indigenous American ancestry are more likely to carry a variant of the MUC19 gene inherited from Denisovans, which may have helped them adapt to new ecosystems. The Denisovan gene variant is surrounded by DNA from Neanderthals, suggesting interbreeding between the two species.
A 140,000-year-old child's skeleton from Israel reveals biological ties between Neanderthals and early Homo sapiens through unique morphological traits. The discovery confirms genetic exchanges between the two groups, with up to 6% of modern humans' genome originating from Neanderthals.
Researchers analyzed stone tools from Kenya's Homa Peninsula and found they were crafted from stronger, volcanic rocks brought from several miles away. This discovery pushes back the earliest known evidence of ancient humans transporting resources over long distances by 600,000 years.
UNLV anthropologist Brian Villmoare and an international team discovered new fossils in Ethiopia that indicate Australopithecus and Homo species coexisted between 2.6 and 2.8 million years ago. The findings suggest a more complex tree-like pattern of human evolution, challenging the traditional linear model.
Scientists have discovered new fossils of Australopithecus and Homo coexisting between 2.6 to 2.8 million years ago, shedding light on human evolution. The new species of Australopithecus has been identified as a distinct lineage, challenging traditional views of human origins.
Researchers found that a single amino acid substitution in the ADSL enzyme affects its stability and expression, contributing to modern human differences in behavior. The study suggests that this change may have provided an evolutionary advantage in certain tasks.
A new study has coined the term 'scrumping' to describe great apes' fondness for eating ripe, fermented fruit from the forest floor. The researchers suggest that this behavior may have played a significant role in the evolution of human alcohol tolerance.
Amino acid mutation allows humans to efficiently burn calories from alcohol, enabling scrumping of overripe fruits. This adaptation is linked to contemporary human habits of feasting and sacred rituals, fostering community identity and cohesion.
A new study found that early humans consumed carbohydrate-rich foods like grains and underground plant tissues before they had the ideal teeth to chew them efficiently. This suggests that behavior played a significant role in their physical evolution, allowing them to adapt to new environments despite physical limitations.
Researchers found that Issa Valley chimpanzees frequently climb trees for valuable food, which could explain why early hominins retained arboreal adaptations. The study suggests that safely navigating the canopy remained important for large, semi-arboreal apes in open habitats.
Researchers analyzed genomic data from over 2,700 Indians to reconstruct evolutionary history, revealing ancestry tied to Neolithic Iranian farmers, Eurasian Steppe pastoralists, and South Asian hunter-gatherers. The study highlights the impact of ancient migrations on genetic variation and disease susceptibility.
A new hypothesis suggests that prenatal sex steroid hormones and placental function played a crucial role in shaping the human brain and its cognitive traits. This may have led to increased brain size and reduced competition among males, allowing for the emergence of large social groups.
A study of ancient genomes from Yunnan, China, has provided new insights into human prehistory in East Asia. The research found that the region is pivotal to understanding the origin of both Tibetan and Austroasiatic population groups, with a previously unobserved Asian ancestry denoted as Xingyi ancestry.
Researchers developed a new method for extracting and identifying proteins from ancient soft tissues, providing insights into past lives and diseases. The technique identified over 1,200 ancient proteins from 2.5mg of sample, offering a window on human history.