Articles tagged with Evolution
Researchers re-examine the fossil record, proposing that animals may have originated between 800 and 700 million years ago, predating some of Earth's most extreme ice ages. This new timeline transforms our understanding of animal evolution and challenges existing assumptions about the origins of life on Earth.
A new study found that chimpanzees steal less pineapple from friends and show less hostility, suggesting they have emotional expectations similar to humans. Closely bonded chimps also experience less agitation when victims are friends, implying mutual expectations in friendships.
Researchers reconstructed the evolutionary history of New World blackbirds, tracing their spread across the Americas as a long, gradual process. The study found that their ancestors reached South America 6 million years ago, coinciding with the expansion of open habitats.
Biologists from UMass Amherst discovered two of the world's loudest birds, the bare-throated bellbird and red-legged seriema, with volumes exceeding 120 decibels. A new study measured the amplitude of 123 bird calls, resulting in a 58-decibel variability, with the hummingbird's call being the quietest at 64 decibels. The study found a ...
This special issue explores the formation, evolution, and maintenance of biological diversity across all branches of the tree of life. Researchers can submit papers on topics such as speciation, adaptive evolution, and eco-evolutionary feedbacks, with a focus on developing a unified evolutionary framework for understanding biodiversity.
A 9-year study of hybrid fish populations shows rapid elimination of foreign genomic regions and maintenance of species boundaries despite extensive hybridization. Key findings include the decline of hybrid genomic regions and the role of reproductive barriers in maintaining species boundaries.
Researchers at the Stowers Institute used AlphaFold2 and evolutionary data to predict protein structures in aphids, which were previously inaccessible to AI. The study reveals a common architectural plan among 2,400 BICYCLE proteins, showcasing the evolution's role in helping AI predict protein structures.
Researchers describe Jeanerpeton mazonensis, a 309-million-year-old proto-amphibian discovered in Illinois, providing insights into ancient amphibian evolution. The fossil specimen features preserved scales, eye impressions, and gastralia, supporting its classification as a distinct species.
Scientists have reconstructed the evolutionary history of bats, providing evidence that they most likely originated in Europe during the late Palaeocene period. The study analysed 103 bat genomes and 44 fossil bats, revealing that bats first evolved in Europe and then spread to Africa, the Americas, Asia, and Australia.
A recent study, led by Arizona State University, has revised scientists' understanding of bat origins, relationships, and evolutionary traits. The team combined genomic and fossil evidence to show that bats and mammalian flight most likely originated in Europe around 65 million years ago.
Researchers found that hyper-local conditions shape eastern grey squirrel coat colors in Montreal, with factors like forest canopy cover and river presence influencing population traits.
A major change in human ancestors' movement took place between 3 million and 1.8 million years ago, combining regular tree-climbing with walking on two legs. Early human ancestors like Australopithecus used trees as much as modern chimpanzees and gorillas do today, but when on the ground, they walked on two legs.
Scientists have created the first global atlas of single-cell microbes living in the aphotic ocean, revealing unexpected functions and capabilities among deep-sea microorganisms. The new database, GORG-Dark, contains over 9,600 genomes from individual microbial cells collected across a broad range of depths and locations.
A study found that when females have multiple males to mate with, their offspring inherit fewer harmful genetic mutations, making the population healthier and less likely to die out. This supports the 'good genes' hypothesis, which suggests successful males tend to have the best genes.
A new genus of insects named Swiftiephylus has been discovered, with four species inspired by Taylor Swift's music and life. The insects are herbivorous, plant-feeders that help with camouflage, and their discovery highlights the importance of taxonomy in conservation.
Scientists have discovered 10 new species of branching marine worms, shedding light on their evolution and diversity. The study, published in the Zoological Journal of the Linnean Society, used DNA sequencing and anatomical analyses to solve a long-standing puzzle and provide new insights into the evolution of complex body forms.
Dr. Sophie de Vries receives funding to study how plants balance immunity with cooperation, while Dr. Tristan Stöber works on developing AI systems that can build accurate internal models of the world. Professor Elisa Oberbeckmann investigates gene regulation mechanisms.
Researchers will investigate how mutation rates evolve across species, with potential insights into cancer progression and antibiotic resistance. The study aims to understand how reproductive modes alter mutation rates, which could inform broader understanding of evolution and adaptation.
Recent advances in human evolution challenge the current classification system, proposing a reclassification of Homo and its closely related species. The research aims to provide a more accurate and stable way to represent the complex evolutionary relationships revealed by the growing fossil record.
Researchers compared Neandertal and modern human pelvises, finding that the male pelvis evolved a unique biomechanical shock-absorbing mechanism that stores energy and facilitates long-distance walking. This innovation likely arose from the need to cushion the impact of each step and release energy with every stride.
Researchers studied two closely related fish species in Lake Tanganyika, finding that they share the same preferences for simple choices but diverge when faced with complex decisions. The blue featherfin makes rapid, decisive choices based on one feature, while the golden featherfin takes longer to decide and considers multiple features.
Researchers used fossil skulls and virtual models to find that the neocortex's expansion was tied to increased visual input. The study challenges a long-held idea about how primates developed large brains.
Researchers found four immune system genes shaped by ancient infectious diseases, which may influence severe COVID-19. Rare genetic variants in these genes were associated with increased risk of severe illness and organ transplants.
A new study from the Centre for Genomic Regulation found that cells use nearly unchanged signals to switch genes on, while varying dramatically to switch genes off in different species. The research provides insights into how genomes evolved and could have implications for medical research.
The study proposes a new hypothesis on the evolutionary history of dinosaur digestive systems by analyzing gastrolith shapes and dietary proxies. Herbivorous dinosaurs likely possessed rounded gastroliths with severe abrasion, suggesting mechanical grinding of plant material within their stomachs.
A team of international researchers has uncovered a unique fossil from China that preserves the digestive system of an ancient marine reptile. The study provides insight into the early adaptations of long-necked marine reptiles to life in the oceans, contradicting previous assumptions about their limited aquatic capabilities.
Researchers found that primates play, groom and care for animals from different species, hinting at social curiosity and readiness to form cross-species bonds. These behaviors may represent evolutionary building blocks for human-animal companionship.
Technion researchers have identified a previously unknown mechanism that enables bacteria to rapidly develop antibiotic resistance. This non-canonical gene amplification process produces dozens of copies of resistance-conferring genes, allowing bacteria to adapt quickly to antibiotic treatment.
Researchers analyzed shark vertebrae to discover a finely engineered biomechanical system supporting strength, flexibility, and swimming efficiency. Different species evolved unique internal structures reflecting their varied swimming strategies.
A clinical case study demonstrates that heterovirulence, a simultaneous presence of subpopulations with different levels of virulence, can lead to the emergence of increasingly virulent subpopulations. This process can occur in seemingly harmless reservoirs, such as urinary tract infections, and contribute to the spread of infection wi...
The paper proposes 'transcending natural evolution' by using technology to augment human abilities, bridging the gap between biological and algorithmic iteration. Recent advances in AI, robotics, and bioelectronics are blurring the lines between digital and embodied intelligence.
A new study from Carnegie Mellon University reveals that baboons and macaques exhibit the same geometric intuitions as young children, suggesting a fundamental similarity in the primate mind. The research found continuity across all groups, including two species of non-human primates, human children, and adult humans.
Researchers used an AI tool to demonstrate that birds in Passeriformes evolved in rapid bursts and coincided with climate shifts throughout Earth's history. The findings suggest that environmental variation may be an important cause of changes in body shape.
A new study reveals that cooperation does not require close family ties or reputation, but rather opponent-specific responses, leading to the emergence of cooperative behavior. This finding challenges conventional evolutionary theory and has implications for the design of more collaborative artificial intelligence systems.
A research team has identified four previously unrecognized fossil bones, including a premaxilla, from a rock containing mosasaur remains in Osaka Prefecture. The fossils exhibit distinctive features unlike those of known mosasaurs, raising the possibility that they represent a new species.
A previously unknown species of African monkey, Colobus congoensis, has been identified in the Democratic Republic of Congo. The species, known locally as Likweli, features a distinctive orange face patch and is one of the rarest discoveries in modern primatology.
A new study has identified 50 previously unknown subfamilies of myosin genes that drive subtle differences in muscle function among various animal species. The findings suggest that the evolution of animals is not solely driven by external appearance, but also by factors nested beneath the surface.
Scientists used a new method to measure Earth's temperature over the Phanerozoic period, finding past temperatures were around 10 degrees Celsius above pre-industrial levels. The study suggests that natural processes have regulated the planet's climate for millions of years, and humans must take action to maintain a habitable range.
Researchers at the University of Michigan found that pollinators are driving plant adaptation in morning glories, leading to a steep decline in their ability to adapt to changing climate conditions. The study suggests that human activities such as pesticide use and habitat destruction have contributed to this decline.
Researchers found basking shark denticles are massive and arranged in 'paver blocks,' allowing for stretching during filter feeding. This unique arrangement may promote flexibility and repel parasites.
A study published in Science reveals that high-altitude mice have adapted to extreme environments by maintaining body heat, sustaining oxygen use, and relying on unusual food sources like lichens. The findings suggest evolution is a complex process with multiple systems shifting to meet environmental challenges.
Researchers discovered that ancient organism Spriggina floundersi preferred to bend to the right, showing the oldest known example of lateralized behavior. This finding provides new insights into the origins of left-right asymmetry in animals and suggests that behavioral preferences emerged earlier in evolutionary history than previous...
A new study reveals that caregiving behaviors in ants are regulated by neural mechanisms that change over the course of an ant's lifetime. The researchers found two brain signaling molecules, Neuropeptide F and Allatostatin A, that act as opposing regulators of behavior, depending on the ant's internal state.
Hawaii's songless crickets have rapidly evolved to overcome reproductive challenges caused by lack of courtship songs. Non-singing males develop faster than wild-type males, allowing them to seek out female mates using alternative methods.
New study redefines the existence of necks in fish and amphibians, identifying functionally distinct anatomical regions. The project aims to build new definitions that apply more widely across all major vertebrate groups.
A UNIGE study reveals that hair follicles organize their positions on the skin of mammals through a self-organizing principle. Researchers found that a chemotactic mechanism, which directs cells to respond to chemical gradients, reproduces the formation of complex biological structures.
A study by Chiba University researchers confirms Gentiana squarrosa obtains carbon through both photosynthesis and fungal symbiosis. The U-shaped pot cultivation system developed for this study enables the verification of carbon transfer between plants via AM fungi in various plant species.
Researchers discovered over 47,000 endogenous viral elements in plant genomes, revealing the wide range of hosts infected by Caulimoviridae viruses. The study also found 35 previously undescribed taxonomic clusters, including a new clade in conifers.
A new evolutionary theory proposes that asexual parasites can temporarily infect a wider range of hosts as harmful genetic mutations build up. This process, known as Ratchet-Driven Generalism, may make the parasite less specialized and more adaptable. However, it may also ultimately reduce fitness and increase extinction risk.
A 300 million-year-old fish fossil has preserved its brain, providing a rare opportunity to study the brain evolution of early ray-finned fishes. The well-preserved brain offers distinct characteristics that suggest a deep-time relationship to modern sturgeons and paddlefish.
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 team of researchers extracted and analyzed protein fragments from fossil teeth of Homo naledi, finding zero male markers. This discovery suggests a sex-bias in mortuary practice among non-human species, unlike observed in contemporary human cultures.
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.
The Colobura butterfly was previously believed to be a single species, but recent discoveries have confirmed the existence of three distinct species. Despite their similar appearance, each species exhibits unique characteristics, such as differences in caterpillar markings and gray band patterns on forewings.
Scientists at MIT developed a theoretical model that predicts the severity of most mass extinctions based on the mismatch between environmental change and biological adaptation rates. The study successfully predicted the fraction of life that went extinct in Earth's history, suggesting that life has evolved to adapt at a similar scale ...
Forming habits can make complex tasks automatic, reducing mental effort required for animals to find food efficiently. Breaking habits may also be essential if a habit is no longer beneficial, suggesting evolutionary benefits for creatures of habit.
Researchers discover fossilized baby early tetrapods, which skipped the tadpole metamorphosis previously thought. This finding upends scientists' understanding of how animals conquered the land, suggesting that early tetrapods were more like fish and birds than modern amphibians.
A new study found that ancient genome duplications laid the foundations for complex brains in vertebrates. The researchers discovered that many major cell type families arose after a genome duplication event, and further duplicates added to this diversity.
A genomic study reveals koalas' population decline began around 100,000 years ago, coinciding with intense glacial environmental shifts. This finding corrects previous estimates and provides a precise timeline for the species' demographic changes.
Researchers found that asexual reproduction slowed the pace of evolution due to limited competition between groups. However, as life spread to shallower waters, stress and increased competition led to the development of sexual reproduction, accelerating evolutionary diversification.