Evolution
Articles tagged with Evolution
Red meat: Evolution’s double-edged sword
Why similar genes can lead to very different brains, a new study offers clues
A new study by Kyota Yasuda found a strong correlation between RBP diversity and neuronal count in six model organisms, suggesting that post-transcriptional regulation is a key factor in nervous system complexity. RBP diversity increased from 397 families in nematode worms to 469 in humans, correlating with enhanced neural complexity.
How a strange fruit fly became a bloodthirsty underwater hunter
Researchers at Lund University mapped the genome of Drosophila enhydrobia, a carnivorous fruit fly that lives entirely underwater in African streams. The study shows clear genetic adaptations to its unusual lifestyle, highlighting the importance of natural history museums for understanding biodiversity and evolution.
Research shows soil temperature modulated millet agriculture in Neolithic East Asia
Doctors favor explaining anxiety to patients as a human evolution ‘success story’
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.
How life could arise from molecules
Complex systems exhibit emergent properties due to water's unique polarity, enabling DNA to store information and proteins to adopt specific structures. This order forms the basis for complex molecules to develop unpredictable properties, driving the evolution of life.
Most birds have not evolved optimal wing-shapes for flight, study finds
Researchers used a technique called theoretical morphospace to analyze bird wings, finding that many species have wing shapes ill-suited for their flight performance. Penguins and hummingbirds stand out as exceptions, having evolved optimally shaped wings for their specialized styles of movement.
A skull full of surprises: Discovering the evolutionary secrets of fish brains
A new study mapped the internal structures of 87 ray-finned species in three-dimensional detail, revealing a wide range of brain sizes and shapes. Environmental factors appear to drive this variation, with deep-sea fishes tending toward smaller brains relative to skull size.
Why are mountain forests in Mexico and Central America hotspots for oak trees? New study led by The Morton Arboretum shows most definitive answer yet
A new study by The Morton Arboretum reveals that oaks rapidly diversified in the Americas when they encountered high-elevation terrain, forming a unique biodiversity hotspot. This is supported by data from 322 of the world's approximately 450 oak species, with Mexico and Central America home to at least 160 different oaks.
Evolutionary history shapes fruit volume while climate modulates its strength
A study analyzing 2,668 angiosperm species found that evolutionary relationships explain the largest share of variation in fruit volume. Climate influences this pattern, with temperature modulating phylogenetic constraints on fruit volume in different plant groups.
Online game reveals secrets of animal camouflage
Researchers used a game to analyze the effects of geometry and lighting on optimal camouflage. The study found that high-contrast markings like tiger stripes are harder to see in sunshine, while plainer patterns provide better camouflage in indirect sunlight.
Fish evolution accelerated after adapting to eat off hard surfaces
Researchers found that fish lineages adapted to scrape algae and shellfish from hard surfaces evolved in more diverse ways than those living in open water. Coral reef fish are thought to have benefited from this adaptation, driving the acceleration of diversification.
Smithsonian-led research shows that scorpions’ weapons are fortified with metal to suit their needs
Researchers at the Smithsonian National Museum of Natural History analyzed 18 scorpion species and found striking patterns in metal concentration and distribution among their pincers and stingers. The study reveals that zinc plays a role beyond hardness, possibly enhancing durability, and provides insight into how organisms adapt to pr...
Giant octopuses may have ruled the oceans 100 million years ago
Early octopuses were gigantic predators that hunted at the top of the food web, alongside large marine vertebrates. They had powerful jaws with extensive wear marks, indicating a strong biting force and aggressive feeding strategy.
Researchers discover the fossil of a new hamster-sized mammal that lived alongside dinosaurs on the Pacific Coast
A new species of hamster-sized mammal, Cimolodon desosai, has been discovered in the Upper Cretaceous El Gallo Formation of Baja California. The fossil, estimated to be 75 million years old, was found alongside dinosaur fossils and provides insights into the survival strategies of early mammals.
Paleobiology: Fossil true bug with remarkable claws
Researchers found a 100-million-year-old forest ecosystem's diversity in Kachin region amber. The fossil, a true water bug with striking chelae, is the fourth known case of these structures evolving independently.
Breathing new life into an ancient mystery: How researchers unlocked the respiratory secrets of the trilobite
A new study confirms that trilobites' feather-like structures attached to their limbs functioned as sophisticated gills, allowing them to extract oxygen from seawater. The research resolves a long-standing controversy over the respiratory capabilities of these ancient arthropods.
Oldest dinosaur tracksite in Northeast Asia discovered: evidence shows large dinosaurs ranges as far as northern Mongolia 120 million years ago
A joint research team has rediscovered a dinosaur tracksite in the Saizhurakh area of northern Mongolia, revealing footprints of both large herbivorous and carnivorous dinosaurs. The site provides clear evidence that large dinosaurs inhabited regions as far north as northern Mongolia during the Early Cretaceous period.
Why did the stag beetle Prosopocoilus hachijoensis lose its ability to fly?
Researchers found that the loss of flight in Prosopocoilus hachijoensis is linked to atrophy of flight muscles and reduced relative wing size. The species' increased reliance on ground-based locomotion, particularly in females, may have driven this adaptation.
Anabaena learns a new trick
Researchers at ISTA report that Anabaena develops a cytoskeleton to control cell shape, transforming an ancient DNA segregation system. This evolutionary shift enables the bacteria to sculpt their cells without relying on traditional spindle-like structures.
Birds that put more energy into parenthood age faster
Researchers found that birds that put more energy into raising their young live shorter lives. After selective breeding, females who produced larger eggs aged faster and died about 20% younger than those that laid smaller eggs.
Nature might have a universal rhythm
A new study suggests that many animal communication signals, including those from insects, birds, mammals, and fish, repeat at nearly the same tempo of 2 hertz. This common tempo may reflect a shared biological constraint, enabling brains to detect signals more easily and process communication more efficiently.
How soil microbes adapt to life in lakes
Researchers found two strategies used by bacteria to colonize new habitats: acquiring new traits and reducing genome size. This study sheds light on the evolutionary biology of soil microbes, revealing unexpected results about their adaptation to freshwater environments.
Seeing red: Dragonflies and humans share the same red-light detection mechanism
Researchers at Osaka Metropolitan University discovered that dragonfly visual protein detects red light similarly to mammals. This finding has potential applications in medical fields relying on red light-sensing, such as optogenetics.
Effects of climate change persist even in great-great-grandchildren
Researchers found that changes in animal development due to climate shock persist even after three generations, leading to increased stress and adaptation. The study suggests that climate change can accelerate evolution by affecting gene expression and development time.
Breathing and moving in the ancient world of reptiles: What a mummified 289-million-year-old reptile can reveal about us today
A 289-million-year-old mummified reptile has provided scientists with a unique window into the evolution of breathing and movement in ancient reptiles. The study found that the reptile's respiratory system is similar to that of modern reptiles, birds, and mammals, suggesting an efficient mechanism for respiration.
The oldest breath: A 300-million-year-old mummy reveals the origins of how amniotes breathe
Researchers uncover 289 million-year-old mummy of lizard-like creature Captorhinus aguti, preserving skin, cartilage, and protein remnants. The find reveals the oldest example of costal breathing system in amniotes, shedding light on early reptile evolution.
New study finds respiratory evolution drove body size differences in early land vertebrates
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 500-million-year-old clawed predator rewrites the origin of spiders and horseshoe crabs
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.
New model shows how behavioral flexibility affects animal evolution
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.
Coral reef science must adapt to have a chance to outpace climate change
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.
Two organs, one brain area: How fish orientate themselves in the water
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.
100 million years ago, an ‘evolutionary fuse’ was lit in the deep ocean, sparking squid diversification
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.
Identifying the limits of protein evolution
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.
Evolution in fast-forward: How thale cress adapts – or goes extinct
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.
Prehistoric fish: coelacanths heard underwater using their lungs
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.
Masripithecus: A new Miocene ape from Egypt sheds light on the origins of modern apes
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.
Cactus catalogue could help plant’s prickly problem
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.
Genetic breakthrough uncovers evolutionary limits of the COVID-19 virus
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.
Chimpanzees can be multitalented musicians
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.
Stolen chloroplasts maintained by host-made proteins offer clues to plant cell origins
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.
The mixed Iberian, Mediterranean and North African ancestry of an individual buried in the Menga dolmen has been revealed
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.
How a clonal fish avoids genetic decay
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.
Rapid evolution can ‘rescue’ species from climate change
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
Hiding in plain sight: Scientists uncover the ancient DNA sequences that control gene function across plant evolution
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.
Snakes off the plane
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.
Evolved robots are born to run and refuse to die
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.
Ctenophore research points to earlier origins of brain-like structures
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.
Evolution of new physical traits in mollusks has declined and grown more predictable over time
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.
Miniscule fossil discovery reveals fresh clues into the evolution of the earliest-known relative of all primates
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.
New study finds earliest evidence of big land predators hunting plant-eaters
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.
Evolution: Ancient mosquitoes developed a taste for early hominins
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.
Scientists lay out what we do and don’t yet know about moths and butterflies
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.
How birds achieve sweet success
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.
Bug beats: caterpillars use complex rhythms to communicate with ants
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.
Why do female caribou have antlers?
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.
Fast-paced lives demand faster vision: ecology shapes how “quickly” animals see time
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.
Uncovering evolution at the center of cell division
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.
Social pressure forces baby clownfish to lose their bars faster
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.