Articles tagged with Evolution
A 500-million-year-old fossil reveals the earliest known chelicerate with a claw, pushing back the evolutionary history of chelicerates by 20 million years. This discovery sheds light on the assembly of the chelicerate body plan and their early ecological context.
Early land vertebrates exhibited distinct patterns of body size evolution, with amniote-lineage land vertebrates experiencing a relaxation of constraints, enabling them to expand their maximum body size limit. Lissamphibian precursors showed stronger constraints on body size evolution and relied on cutaneous CO2 excretion.
A new model by Carlos Botero suggests that animals with moderate behavioral flexibility can quickly adapt to environmental changes and evolve new forms, challenging the assumption that slow-evolving species are at higher risk from climate change. The model predicts that flexible lineages may fare better than previously thought.
A large-scale computational study found that point-of-origin effects significantly influence protein diversification, with relatively small divergence seen from ancestral proteins. The research reinforces existing theories on initial protein formation and highlights the limitations of modern AI protein design methods.
A study calls for increased coral assisted evolution research to help reefs cope with rapidly warming oceans. The international team identified nine research priorities, including expanding large-scale field-based research and long-term funding to understand coral biology.
Researchers at Osaka Metropolitan University identified the tegmentum region as the area where light signals from the eyes and pineal organ are integrated. This integration enables fish to swim up or down based on differences in light wavelength, aiding survival decisions.
A new study from Okinawa Institute of Science and Technology (OIST) identifies the 'long fuse' that led to the diversification of modern squid and cuttlefish. The research suggests that these animals originated in the deep ocean around 100 million years ago, sparking rapid evolution after a mass extinction event.
Researchers discovered that 240-million-year-old coelacanths used their lung to detect sounds underwater, employing an ossified lung and a canal connecting the hearing organs. This finding provides valuable insight into the evolutionary history of these fish and may also reveal secrets about our own aquatic ancestors.
A newly discovered fossil ape from Egypt, Masripithecus moghraensis, sheds light on the origins of modern apes. The species, which lived around 17-18 million years ago, provides a crucial intermediate link between African and Eurasian fossil records, revealing that apes were already diversifying in the region.
Researchers tracked genetic changes in Arabidopsis thaliana across 30 sites over five years, finding most populations adapted to local environmental conditions. However, some populations went extinct due to genetic drift, highlighting the importance of preserving biodiversity.
A new study reveals that COVID-19 virus genetic evolution was constrained within limited channels despite rapid changes. The research found that the virus altered by combining pre-existing mutations, rather than expanding its genetic routes.
Researchers at Kyoto University's EHUB center analyzed the musical performances of a 26-year-old male chimpanzee named Ayumu. The study found that Ayumu's instrumental sound-making was not random and exhibited isochronous intervals, similar to a metronome.
A new open access database of cactus ecology and evolution could help scientists and conservationists save species from the brink. The CactEcoDB offers an unprecedented window into the evolution, ecology and conservation needs of one of the world's most distinctive and endangered plant families.
A single-celled predator, Rapaza viridis, retains chloroplasts from prey algae and imports host-made proteins into them, revealing deeper levels of host–organelle integration. This process may have played a role in the emergence of plant cells.
A study led by Dr. Edward Ricemeyer reveals that the Amazon molly maintains its genome through gene conversion, which helps remove harmful mutations and allows natural selection to keep working in the absence of recombination. This process empowers natural selection in a clonal fish species, maintaining overall genome integrity.
A medieval individual buried in the Menga dolmen in Andalusia has been found to have a mixed ancestry, with uniparental lineages typical of European populations and mitochondrial DNA shared with modern North African individuals. The study sheds light on the genetic diversity of Andalusian society during the Middle Ages.
A new study has identified ~2.3 million conserved non-coding DNA sequences across 284 plant species, revealing deep principles of plant genome evolution. These ancient regulatory sequences can be maintained despite repeated genome duplications, opening the door to precise engineering of plant traits.
Researchers tracked scarlet monkeyflower populations in Oregon and California, finding that those that evolved fastest recovered from extreme drought. The study provides the first full documentation of
Researchers discovered a simple strategy for snakes to stand upright without limbs, concentrating bending and muscle activity into a short boundary layer near their base. This approach reduces energy required while maintaining balance, offering design principles for soft robots and medical devices.
Researchers at Northwestern University have developed AI-designed robots called 'legged metamachines' that can combine and recombine in the wild, recover from injury and transform into new shapes. The robots can adapt to the environment, survive catastrophic damage and even recover from being chopped in half or cut into pieces.
A new study by Geerat Vermeij and Tracy Thomson found that mollusks evolved unique physical traits at a frequency of once every 2 million years in early history, declining to about one trait every 9 million years. The evolution of these traits has become increasingly predictable over the 540-million-year history of mollusks.
New 3D reconstructions of a key sensory organ in ctenophores show unexpected structural and functional complexity. The findings suggest that an elementary brain may have already appeared in our most ancient relatives, challenging the current understanding of nervous system evolution in animals.
The discovery of miniscule Purgatorius fossils in Colorado provides fresh insights into the evolution of the earliest-known relative of all primates. The find suggests that archaic primates originated in the north and spread southward, diversifying soon after the mass extinction at the end of the Cretaceous Period.
Researchers from University of Toronto found evidence of large predators like Varanops and Dimetrodon hunting young herbivores in the early Permian period. Scavengers and small arthropods also fed on these carcasses, highlighting a complex food web in ancient ecosystems.
Researchers found that birds adapting to sugar-rich diets evolved both shared and unique genetic changes, affecting genes controlling blood pressure, heart rhythm, and insulin signaling. These findings hold promise for understanding metabolic diseases like diabetes and may lead to new therapeutic targets.
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 shed light on moths & butterflies' evolution, conservation needs, and diverse feeding habits. Discoveries suggest that these insects obtained plant-digesting abilities from fungi, while mandibled moths were once more diverse but largely extinct.
Researchers found caterpillars mimic ant signals using precise rhythmic beats to gain acceptance, feeding, and protection. The most ant-dependent species produce regular, complex rhythms similar to those used by ants.
Researchers at the University of Cincinnati found that female caribou gnaw on shed antlers to supplement their diets with calcium and phosphorus, essential for milk production. The study, published in Ecology and Evolution, reveals a previously overlooked benefit of shed antlers in the Arctic ecosystem.
A new study reveals that animal species with fast-paced ecologies have faster visual perception, tracking prey in mid-air versus grazing slowly across the seabed. This finding supports Autrum's hypothesis and highlights how ecology shapes the tempo of perception across life on Earth.
A new study reveals that the presence of older fish accelerates bar loss in young tomato anemonefish, a process linked to social hierarchy and environmental adaptability. The researchers suggest this may be an insurance policy against invasion, with younger fish losing their bars as they are accepted into the group.
Researchers at Max Planck Institute of Molecular Physiology have discovered the genetic origin of the tiny and precise centromeres in brewer's yeast. They found that these centromeres evolved from a likely intermediate stage and were shaped by retrotransposons, providing a concrete genetic explanation for their unique structure.
Scientists from the University of Texas at Austin have solved the mystery of how complex life evolved. The discovery suggests that eukaryotes arose when an Asgard archaeon developed a symbiotic relationship with an alphaproteobacterium, which led to the evolution of mitochondria and oxygen-based energy metabolism.
A collaborative effort by researchers from the University of Göttingen and other institutions is creating a genomic inventory of European marine annelids. The goal is to accelerate biodiversity research worldwide and counteract the 'silent extinction' of marine species.
A new tool has arrived: a highly customizable, open-source robot design called The Robot of Theseus (TROT), developed at the University of Michigan. TROT can model most mammals and enable direct comparisons of variations on the same structure, helping researchers discover the advantages related to limb length and segmentation.
Scientists discovered a 307-million-year-old fossil of an early land vertebrate that evolved to eat plants, challenging previous assumptions about the origins of herbivory. The 'tyrant digger' had tough teeth on its roof and probably ate smaller animals along with vegetation.
Researchers developed a thermodynamically controlled coordination strategy to modulate magnetic domain configurations, enabling precise regulation of magnetic nanoparticle spacing and resulting in effective low-frequency EM wave absorption. The approach also enhances interfacial electron transport and polarization loss, making the mate...
Scientists discovered a significant portion of plant diversity on Hispaniola originated from eastern Cuba, tracing back to 1.6 million-year-old bird dispersal events. The findings highlight the importance of birds as primary seed dispersers in this biodiversity hotspot, which faces extensive habitat loss.
A study found that cultivating tobacco with its wild relative can erase genetic barriers, allowing normally fatal hybrids to survive. This process, called genome shock, neutralizes lethal gene combinations, potentially leading to the creation of new plant species.
Urbanization may be shaping the spotted lanternfly's spread into new environments by allowing them to adapt to heat, pollution, and pesticides. The insects' genetic diversity is lower in the US compared to China, but they are still adapting to local climate conditions.
A team of researchers used AI to analyze the activity of genetic control elements in the developing mammalian cerebellum, identifying specific elements unique to the human lineage. The study reveals how these elements may have contributed to key evolutionary innovations in the human brain, including the expansion of the cerebellum.
A new study in Systematic Entomology reveals that evasive butterfly mimicry in the genus Adelpha may be a rare and overlooked type of mimicry. The researchers found that Adelpha butterflies use speed and unpredictability as a defense mechanism, making them difficult to catch for birds and other predators.
A genetic study reveals that saltwater crocodiles on remote Seychelles islands were part of a western population, confirming earlier hypotheses based on external characteristics. The species' unique adaptations enabled them to colonize islands and coastal regions over long distances.
The Huayuan biota provides a rare snapshot of ancient ecosystems following the Sinsk Event mass extinction, featuring diverse animal species, complex food webs, and fully functional biological carbon pump mechanisms. The discovery sheds light on transoceanic dispersal events and refugia for faunal migration during this critical post-ex...
Researchers found that the green-flowered Aeschynanthus acuminatus evolved on the mainland, not in Taiwan, and adapted to shorter-beaked birds. This contradicts the Grant-Stebbins model of plant evolution, which predicted the species would evolve in Taiwan with new pollinators.
A study led by Lund University reveals how a dominant wall lizard species has wiped out several color variants within its population. The researchers analyzed data from over 10,000 individuals and found that the aggressive 'Hulk' lizards have shifted the balance of colors, leaving only white throat colors remaining.
Researchers identified 48 OR genes, 2 V1R genes, and 135 V2R genes in hagfish, indicating functional roles in smell perception. The discovery overturns the assumption that true V2Rs evolved only in jawed vertebrates.
A new study found that population bottlenecks can fundamentally reshape how cooperation evolves and persists in complex microbial societies. The researchers discovered that stringent bottlenecks favored fruiting body formation and growth, while relaxed bottlenecks led to an overall increase in competitive fitness.
A team of international scientists led by Dr M. Eleonora Rossi from the University of Bristol reconstructed sponge skeleton evolution, finding that spicules evolved independently in different groups. This discovery challenges previous estimates of sponge origin and sheds light on early animal diversification.
Researchers identified genes controlling the switch between unicellular and multicellular life forms in marine yeast, revealing a molecular mechanism for clonal multicellularity. The study provides insights into how multicellular life may have evolved from single-celled ancestors.
A team of anthropologists offers powerful evidence that Sahelanthropus tchadensis, a seven-million-year-old fossil, was bipedal. The analysis confirmed the presence of traits essential for walking upright, including a femoral tubercle and gluteal muscles. This finding suggests that bipedalism evolved early in our lineage.
A study analyzing corporate ESG reporting through data mining reveals a significant trend toward the homogenization of reports, with greater emphasis on social and governance issues. The findings suggest that companies are adopting similar ESG frameworks, which can enhance legitimacy but limit innovation.
Researchers created a map of regulatory DNA elements in the starlet sea anemone Nematostella vectensis, showing how its genome gives rise to diverse cell types. The study reveals that gene regulation networks are a creative tool for evolving complex cell diversity.
Research shows that ants with less protective armor, such as cuticle investment, tend to have larger colony sizes and are more successful in terms of diversification rates. This suggests that complex societies like humans may evolve by sacrificing individual quality for collective power.
A new study has found that frogs have preserved their skin and eye structure over millions of years, with melanosomes showing similar shapes in fossil and modern specimens. This suggests that some species are maintaining ancestral traits instead of evolving new ones.
Research led by the University of Washington found that climate transitions over 56 million years ago fueled the emergence of diverse carnivoran body shapes. The Eocene-Oligocene Transition led to changes between families, while the Mid-Miocene Climate Transition drove diversification within families.
A study by University of Washington researchers found that climate changes over 56 million years ago led to diversification of modern carnivores. The Eocene-Oligocene Transition and Mid-Miocene Climate Transition drove the emergence of new body shapes among species such as dogs, cats, bears, and seals.
Dr Bandit Heeler, a celebrated archaeologist and Father of the Year, has been offered a professorial chair at Griffith University. His research on canine origins and language capacity will contribute to the university's commitment to academic excellence.
Dinosaur fossils with preserved feathers indicate these species lost the ability to fly, challenging previous theories on flight origins. The study provides a rare glimpse into ancient creatures' functioning, suggesting complex wing evolution in dinosaurs and birds.
A new study found that Italian bears living in areas with many villages have evolved to become smaller and less aggressive. The researchers attributed this change to the removal of more aggressive bears by humans, which led to a selection for behavior-related genetic variants associated with reduced aggressiveness.