Articles tagged with Human Evolution
A new study analyzing human portraits from 15th to 20th century European paintings found a widespread 'forward bias' in spatial composition, with more open space in front of depicted subjects than behind them. This bias increased over time, particularly after cultural norms favoring centering loosened.
A new study using Bayesian statistics estimates the odds of life and intelligence emerging on planets similar to Earth, suggesting that complex extraterrestrial life is possible. The analysis indicates that life should have little problem spontaneously emerging on other planets, but intelligent life is less likely.
Researchers found that regulatory switches involved in knee development also play a role in osteoarthritis, a partially heritable disease affecting 250 million people worldwide. The study suggests that subtle modifications in the knee's shape may increase risk of developing osteoarthritis over time.
Researchers analyzed buccal dental microwear to determine the diet of fossil Theropithecus oswaldi, finding a more abrasive diet than current T. gelada, similar to other primates that eat fruits and seeds in forested ecosystems.
Researchers used cognitive science experiments to investigate the potential symbolic function of 40,000-year-old engravings found in South Africa. The findings suggest that these engravings evolved over time to serve an aesthetic purpose and marked group identity.
A study on megafauna species distributions across eastern China over the last 2,000 years revealed strong declines for all five taxa. The expansion and intensification of agriculture, along with other cultural changes, were found to be key drivers of these declines.
Researchers found that chimpanzees exhibit rhythmic swaying and hand-clapping when exposed to musical sounds. The study suggests a foundation for dancing in our common ancestor with humans.
A study by Tohoku University researchers reveals that ancestral VMAT1 proteins exhibited increased neurotransmitter uptake, potentially linked to higher levels of anxiety or depression. The findings suggest that our ancestors may have been able to withstand higher levels of anxiety.
Two female chimpanzees exhibit synchronized bipedalism, displaying near-perfect precision in whole-body tempo synchronization. The discovery sheds light on the evolution of human dance and highlights conjoined full-body rhythmic entrainment in great apes.
A study by Alexandre Celma-Miralles and Juan Manuel Toro found that humans can detect isochronous beats, regardless of other irrelevant features, similar to rats. The researchers suggest that this ability has ancient evolutionary roots and may rely on timing mechanisms present in mammals.
Scientists have successfully linked the extinct giant ape, Gigantopithecus blacki, to its closest living relative, the orangutan. Genetic material from a 2-million-year-old fossil was retrieved using ancient protein sequencing, revealing key insights into human evolution.
The study reveals that repeated genomic regions expanded during human evolution and associate with differential gene expression in human and chimpanzee brain cell types. Expanded tandem repeats may hold clues to mechanisms driving their expansion and potential roles in human development.
A new federal grant will provide Kent State graduate students with invaluable opportunities to study primates and human evolution at Kyoto University in Japan. The International Research Experience for Students (IRES) grant, awarded by the National Science Foundation, will allow six students to travel to Japan each summer for three years.
Fossils found in southeastern China provide insights into Middle Pleistocene human evolution. The discovery sheds light on the continuity of form through time and regional variations among early Asians.
Research at the University of Liverpool found that people with obesity are stigmatized and explicitly considered to be less human than those without obesity. This blunt dehumanization was linked to support for health policies that discriminate against individuals due to their weight.
A new study by McGill researchers found that, on average, human disturbances do not appear to accelerate evolution. The authors analyzed 40 studies on species' responses to human activity, covering 102 traits in 37 different species.
Researchers at Michigan State University have developed a new genetics tool called conStruct to analyze large datasets of genetic variation. The tool helps identify patterns of relatedness among individuals and populations, overcoming previous statistical challenges.
Researchers propose a new perspective on the Gaia hypothesis, integrating human consciousness into the planet's self-regulation system. This 'Gaia 2.0' framework suggests that humans can deliberately limit their impacts on the environment through conscious choice and technological advancements.
Research found that the intensity of shame people feel when imagining various actions accurately predicts the degree to which those actions would lead others to devalue them. This universal human quality helps individuals balance personal costs and benefits with social costs and benefits.
Researchers used a quantitative method to analyze over 140,000 artworks and found a temporal evolution of artistic styles reflecting divisions in style during Renaissance, Modern, and Contemporary art. The study demonstrates the utility of quantitative metrics in assessing artistic style evolution.
Research finds that pride serves an evolved function in human nature, helping individuals weigh self-interest against social approval. The study reveals a close link between pride and the values of those around us, suggesting it's a win-win rather than a sin.
A study published in Evolution & Human Behaviour found that social bonding and a desire to protect fellow fans are key motivations for football hooliganism and extremist group behaviour. The research suggests that reducing membership to extreme groups may not prevent violence, but tapping into their commitment could have positive effects.
Researchers propose that wars between patrilineal clans led to a collapse in male genetic diversity around 7,000 years ago. This phenomenon, known as the Y-chromosome bottleneck, was observed only in men and has been linked to changes in social structures after farming and herding emerged.
A study finds that intensive agriculture facilitates sociopolitical hierarchy in cultural evolution. The results suggest a reciprocal relationship between the two traits, with each facilitating development of the other to a comparable extent.
A new themed issue of the Royal Society journal explores human evolution through an interdisciplinary lens, combining biological, anthropological and cultural perspectives. Researchers found that English speakers' regional dialects influenced Sranan creole's development, shedding light on events in human history with few other traces.
Researchers found that resource-rich environments cause people to favor short-term relationships, leading to a 16% increase in preferences for short-term partnerships. Human behavior is influenced by environmental cues, and this study demonstrates the adaptability of relationship preferences in response to changing circumstances.
A recent study at the University of Turku found that X-chromosome relatedness between grandmothers and their grandchildren did not affect grandchild survival. The study tested a hypothesis about the genetic inheritance of grandmothers' help towards their grandchildren, but did not produce enough support for its claims.
Female chimpanzees who leave their family and friends behind take longer to become mothers, around three years on average, due to social integration challenges. In contrast, those with supportive networks start reproducing earlier, raising questions about the factors influencing this behavior.
Bioarchaeology International is a new journal that aims to unify perspectives in the field of bioarchaeology by providing a space for peer-reviewed articles and encouraging global discussion. The journal will release its inaugural issue on June 30, 2017, and will focus on integrating material and biological evidence left behind in graves.
Researchers at UT Austin discovered systematic laws for perception in natural scenes, predicting object detection based on background properties. This finding has potential applications in radiology, security imaging, and camouflage design.
Researchers discovered that humans have a superior capacity to deal with sequential information, making it easier to distinguish between stimuli sequences. This ability is crucial for language, mathematics, and strategic games, and may have evolved during human prehistory, supporting the later development of these traits.
New fossil finds from the Jebel Irhoud site in Morocco provide evidence that human ancestors ate a diet rich in game, including gazelle and wildebeest. The discovery pushes back the origins of Homo sapiens by 100,000 years to around 300,000 years ago.
A new study from NIMBioS explores human social norms and their evolution. The model found that norm internalization readily evolves in both 'us-vs.-nature' and 'us-vs.-them' scenarios, suggesting a genetic variation in humans' ability to internalize norms.
Researchers analyzed orangutan teeth to reconstruct diet histories and determine nursing patterns, shedding light on the evolution of human breast-feeding. Orangutans' cycles of milk consumption may inform models of population growth and resilience in humans.
Researchers developed a new model to analyze ancient lives using biological and cultural data from grave sites. They examined cranial characteristics, head shapes, isotopic analyses, and grave goods to understand individual identities and community shifts in northern Chilean society during the Middle Horizon and Late Intermediate Period.
Researchers found that sharing strong negative experiences enables extreme cooperation in groups and can cause individuals to be willing to die for the group. Human evolution explains the origin of this visceral bonding over shared painful experiences.
A recent study examining 1,600 instances of phenotypic change worldwide shows that urbanization is affecting the genetic makeup of species crucial to ecosystem health. The research highlights the importance of understanding human-induced trait changes and their implications for ecological and human well-being.
Researchers propose new approaches to fight diseases using economic epidemiological modeling and Lagrangian approach, which consider unique factors of social and geographic patches
Research highlights how humans impact the evolution of other species, leading to rapid changes in a few years to decades. Examples include commercial fishing, invasive species, and urbanization, which drive evolutionary adaptations.
A recent study suggests that individuals with autism may have played an important role in their social groups due to their exceptional memory skills and heightened perception. Collaborative morality, which emerged around 100,000 years ago, allowed for the acceptance and respect of people with autistic traits.
A new study reveals that male chimpanzees benefit from befriending the alpha male, gaining priority to preferred mates and a greater chance of passing on genes. Subordinate males can also benefit by having social favors, such as support in fights.
A team of researchers, including a Pitt University expert, analyzed core samples from Lake Malawi to find that the continent has experienced a 100,000-year cycle of wet and dry conditions, contrary to previous studies that suggested it was drying. The findings shed new light on human evolutionary theory and the savannah hypothesis.
A new study by Joyce Benenson found that men are more likely to engage in friendly physical contact after competition than women. This finding supports the 'male warrior hypothesis,' which suggests that males broker good feelings after conflict to ensure they can call on allies to defend their group.
A study published in The Open Psychology Journal found a strong correlation between motivation to work and attraction to leisure. Researchers discovered three distinct groupings of individuals based on their strongest motivational factors, suggesting that the 'work hard, play hard' motivation could serve an evolutionary purpose.
A study published in Molecular Biology and Evolution identifies ultraconserved elements (UCEs) essential for animal development. Researchers found that UCEs act as hubs to allow genome access for multiple proteins, contributing to the extreme DNA sequence conservation observed.
Researchers found that humans consume 400 more calories daily than chimpanzees and bonobos, and 635 more calories than gorillas and orangutans. This higher metabolism supports having larger brains and longer lifespans.
Research by University of Notre Dame professors Darcia Narvaez and colleagues found that childhood experiences meeting evolved needs lead to better outcomes in adulthood. Adults who received more physical affection, playful interactions, and supportive care had lower depression and anxiety, greater empathy, and improved moral capacities.
A new study reveals that people from different regions host different mite lineages, supporting the 'Out of Africa' theory. The study found that mites follow families through generations and are not easily transferred between humans.
A researcher has uncovered a relationship between upright locomotion and spinal health, finding that human vertebrae with disc problems are closer in shape to those of chimpanzees than those without disc problems. The study suggests that evolution may not have fully adapted the human spine for bipedal walking.
Researchers have deciphered gibbons' subtle 'hoo' calls in response to specific events like foraging and predator encounters, revealing context-specific vocal communication. The study's findings suggest that gibbon vocalisations may hold clues about the evolution of human speech.
Researchers found that schizophrenia gene loci are linked to regions called human accelerated regions (HARs) in the genome, which control gene expression. These HAR-associated loci play a key role in regulating genes linked to schizophrenia, particularly those related to neurotransmitter GABA and brain development.
A new study suggests that prehistoric conflict played a crucial role in the evolution of humans' ability to work together, overcoming costs associated with large brains. The research proposes that warfare and 'us vs. them' activities drove the emergence of high intelligence and cooperative behavior.
A study published in Nature Communications reveals that the evolution of competitiveness tends to diversify, with some individuals avoiding competition and others investing heavily. This divergence can lead to population extinction if external pressures fuel an 'arm's race' towards higher competitiveness.
A recent study published in Proceedings of the Royal Society B analyzed the vocal sequences of seven different species and found that they appear to be generated by complex statistical processes more akin to human language. The findings suggest an intermediate step on the evolutionary path between animal communication and human language.
A Georgia State University research study found that chimpanzee intelligence is largely determined by genes, while environmental factors may play a lesser role. The study's findings suggest that genes significantly influence cognitive abilities in chimpanzees, with some similarities to the structure of human intelligence.
Researchers propose that human language evolved by integrating finite-state components from birdsong and primate communication systems. This 'integration hypothesis' suggests that the melodic part of human language comes from birdsong and the pragmatic parts from primates, with these elements combining around 100,000 years ago.
A recent study suggests that the evolution of human brain and brawn are intertwined. Human muscle accumulated more metabolic change than chimpanzees, while the human brain metabolome evolved four times faster. These findings may hold clues to common human metabolic diseases.
Researchers found that 7,000 years ago, fighting conchs had 66% more meat than their descendants, leading to evolutionary change due to human harvesting. The study suggests that long-term size-selective evolution can damage vital traits like reproduction and offspring quality.
A new Harvard University study found that women of different social ranks cooperate with each other less well than men do, but not when they are at the same rank. The research suggests that biological and cultural factors may contribute to these differences in cooperation.
New research confirms Ardi's close evolutionary relationship to humans, revealing a pattern of similarity linking it to Australopithecus and modern humans. The study shows that the human cranial base pattern is at least a million years older than previously thought, with implications for our understanding of human evolution.