A new study tracks natural selection in green anole lizards that survived a record-breaking winter in Texas, revealing a shift towards more robustness against cold weather. The research provides valuable insights into how extreme weather events affect natural populations and the evolution of species.
The American pika's behavioral adaptations to climate change include shifting mating seasons, migrations, and adjustments in feeding and foraging strategies. However, these adaptations are limited by physiology and may incur costly trade-offs with other essential activities.
Scientists describe a new subspecies of yellow sea snake with an unusual ambush posture that feeds on small fish at night. The species has a restricted geographic range due to its adapted habitat, making it susceptible to extinction.
Researchers have identified a rare pterosaur pelvis in Alberta's Dinosaur Provincial Park, showing that these ancient reptiles were well adapted for walking on land. The study provides evidence that azhdarchids likely used their powerful hindlimbs to transport themselves on the ground.
A new study finds over 30% of vertebrate species are declining in population size and range, with tropical regions hit hardest. The research suggests that the disappearance of species tells only part of the story of human impact on Earth's animals.
A new study has found that the mass extinction event that wiped out dinosaurs simultaneously led to the evolution of three major lineages of modern frogs, which make up about 88% of living species. This finding suggests that the survivors filled up new ecological niches after the extinction event, resulting in the rapid diversification...
Researchers linked mechanical properties of titin to animal size, revealing that larger animals had less stable proteins. By comparing ancestral protein sequences with fossil records, they estimated the weight of ancient mammals, birds, and tetrapods, finding them to be relatively small.
A rare fossil of Eusaurosphargis dalsassoi has revealed the animal's complete skeleton, providing a clear idea of its anatomy and probable lifestyle. The species is thought to have been adapted for life on land, contradicting earlier assumptions that it was aquatic.
A newly discovered ancient reptile from Switzerland shows its unique scale armor for the first time. The Eusaurosphargis dalsassoi has a life on land skeleton despite being found with fish and marine reptiles.
Harvard Medical School researchers studied chicken embryos to understand the formation of high-acuity spot in the retina, which enables crisp daytime vision. They found that suppression of retinoic acid plays a crucial role in this process.
Scientists have identified a new fungal skin disease affecting European wild snakes for the first time. The study, led by the Zoological Society of London, confirms that snake fungal disease (SFD) is present in UK and Czech Republic snakes, posing no risk to humans or livestock.
Researchers found clear links between volcanic activity and the end-Triassic mass extinction. The study revealed repeated large emissions of carbon dioxide from volcanoes, which led to a profound impact on the global climate.
A UTEP doctoral candidate has discovered three new species of chameleons in the Albertine Rift region of Central Africa. The reptiles were found to be endemic to specific mountain ranges, with two species named after their habitats and a third species named after herpetologist Krystal Tolley.
Researchers identify new Aleodon species in Brazil, previously thought to be Chiniquodontids. The discovery strengthens the correlation between probainognathians from South America and Africa.
A study led by neuroscientists found that oxytocin in the amygdala inhibits a self-defense reaction, allowing mothers to protect their young. The team manipulated oxytocin levels and observed increased defensive behavior when the hormone was inhibited.
The study found that the highest number of alien species can be found on islands and in coastal regions, with Hawaii leading the way. The researchers also discovered that densely populated areas and economically developed countries are particularly vulnerable to the introduction of new species.
Researchers found high numbers of invasive species in island and coastal regions, particularly in the Hawaiian Islands, New Zealand's North Island, and Indonesia. The study highlights the need for effective measures to prevent further introductions of alien plants and animals into vulnerable ecosystems.
A 10-year, $2.7 million project in Ontario reduced turtle deaths on a causeway by 89%, offering global lessons for protecting endangered species. The initiative included fencing, culverts, and public awareness campaigns to reduce roadkill, with significant success.
A new species of pliosaur, a large predatory marine reptile from the 'Age of Dinosaurs', has been found in Russia. The discovery reveals that pliosaurs colonized a wider range of ecological niches than previously thought.
Researchers at UC Berkeley have identified conscientiousness in a range of animal species, from birds to insects. This trait, characterized by working hard, paying attention to detail, and striving to do the right thing, is linked to evolutionary benefits such as improved hunting success and mating advantages.
Researchers observed Cuban boas in bat caves and found that coordinating their positions formed a wall across the entrance, making it difficult for bats to pass without getting within striking distance. This cooperative hunting strategy was always successful, with more snakes present leading to faster capture times.
Researchers at UC San Diego have developed nanoparticles that mimic the behavior of natural melanosomes, protecting skin cells from UV radiation. These synthetic melanin-like nanoparticles show promise as artificial melanosomes for novel therapy development.
Researchers found T. rex could generate forces equal to three small cars while simultaneously applying world-record tooth pressures. The dinosaur's long conical teeth allowed it to drive open cracks in bone and produce catastrophic explosions.
Researchers found that American alligators use vocalizations to signal their body size, which is a common pattern also seen in birds and mammals. This acoustic cue allows individuals to avoid physical confrontations and ensures mating success.
Climate change is shown to impact gut bacteria diversity in common lizards, with a 34% loss of microorganism diversity found at warmed temperatures. This finding highlights the importance of research into how climate change affects bacteria associated with plants and animals.
Researchers found that early mammalian ancestors enhanced their night vision genes, allowing them to thrive in the dark. This study supports existing fossil evidence and sheds light on the evolution of vision in mammals.
A study by Hokkaido University researchers found that grouping female American cockroaches promotes asexual egg production, with synchronized egg case delivery in synchrony. The females perceive female-specific chemosensory signals via their antennae, leading to increased fecundity and colony survival.
A new type of footprint made by 247-million-year-old reptiles has been discovered in the Pyrenees. The discovery suggests that archosauromorphs played a large role in vertebrate recovery following the Permian mass extinction.
Researchers have found a carnivorous dinosaur relative with a crocodilian body plan, forcing them to re-evaluate their understanding of dinosaur evolution. The discovery sheds light on the complex history and traits of early ancestors.
The newly-discovered Teleocrater rhadinus is a six-foot-long lizard-like carnivore that has unexpectedly crocodile-like features, causing scientists to reassess the earliest stages of dinosaur evolution. It shares more features with its distant crocodilian cousins than previously thought.
A new species, Teleocrater rhadinus, discovered in Tanzania, has a long neck and tail, but walks on four legs like a crocodile. The finding sheds light on the distribution and diversity of ancestors of birds, crocodiles, and dinosaurs.
A new species of ancient reptile, Teleocrater rhadinus, has been described, filling a critical gap in the fossil record. The carnivorous reptile was approximately 7-10 feet in length and walked on four crocodile-like legs, challenging preconceptions about early dinosaur relatives.
Researchers have re-evaluated and re-classified Diandongosuchus fuyuanensis, a reptile previously labeled as a poposauroid, linking it to the phytosaurs. The fossil's shape reveals its connection to this extinct group of semi-aquatic reptiles that lived during the Triassic Period.
A new study finds that tropical lowland frogs are more vulnerable to climate change due to their limited ability to tolerate high temperatures. In contrast, high-elevation species may be better buffered against temperature increases.
A new study from the University of Cambridge and Natural History Museum proposes a major overhaul of the traditional dinosaur classification system. The researchers conclude that Ornithischia and Theropoda should be grouped together under the name Ornithoscelida, with dinosaurs potentially originating in the northern hemisphere.
A new strain of ranivirus is causing mass mortality in amphibian populations in Serra da Estrela Natural Park, Portugal. The virus also affects fish and reptiles, complicating the situation and requiring urgent optimization of conservation strategies.
Researchers studied 19 virus families and found that cross-species transmission has played a central role in their evolution. Co-divergence is relatively rare compared to cross-species jumps.
Researchers have confirmed that two extinct species of ichthyosaurs are the same, resolving a long-standing mystery. The study, published in Journal of Systematic Palaeontology, analyzed thousands of fossils and provided a superior understanding of the species.
A new amphibian species, Pristimantis attenboroughi, has been formally described from the Peruvian Andes, with characteristics including pale to dark gray coloration and distinct stripes. The species is considered Near Threatened due to habitat loss and climate change, highlighting the need for conservation efforts in protected areas.
Researchers uncovered the fovea's computational architecture and basic visual processing, distinct from other regions of the retina. This discovery helps explain differences in central and peripheral vision qualities.
A remarkable 250 million-year-old fossil found in China shows an embryo inside the mother, providing clear evidence for live birth. The discovery rewrites the understanding of reproductive evolution in a wide group containing birds, crocodilians, dinosaurs, and pterosaurs.
A 250 million-year-old fossil from China shows an embryo inside its mother, revealing the first evidence of live birth in a group previously thought to lay eggs exclusively. The discovery, made by an international team of scientists, pushes back the evidence of reproductive biology in this group by 50 million years.
Researchers found that beta-carotene supplementation increased overall yellowness and redness of the skin, making faces more attractive and perceived as healthier. However, the treatment did not affect any health functions or actual health outcomes.
Research reveals that red-footed tortoises remember visual cues associated with different reward values, including quantity and quality of food, for a significant period. This long-term memory enables them to make informed foraging decisions, improving fitness by reducing the need to re-evaluate food sources.
Experts recommend using risk assessment to regulate endocrine disrupting substances, considering exposure and effects on sensitive species. Hazard assessments are suitable in absence of sufficient data.
A recent study published in Nature Communications suggests that humans, not climate change, led to the extinction of Australian megafauna around 45,000 years ago. The researchers analyzed ancient poop and sediment cores, finding a significant decline in megafaunal populations during this period.
A new study from Rice University found that smaller, younger predators have a significant ecological impact on pond ecosystems. The research, which involved over 54 test ponds and thousands of hours of data analysis, showed that even the earliest stages of salamander development can lead to lasting changes in the environment.
A recent study finds that urban centers like Hong Kong can play a crucial role in conserving globally threatened species. Introduced populations of these species have been thriving outside their native habitats, providing an opportunity to augment declining populations in their native ranges and mitigate threats to local ecosystems.
Research on dinosaur embryos shows that non-avian dinosaurs took 3-6 months to hatch, similar to reptiles. This finding suggests prolonged incubation may have affected their ability to compete with rapidly evolving bird populations, contributing to the mass extinction event.
Researchers found that invasive species on Hawaii Island are successful invaders due to their scavenging abilities, which create a nutrient resource for other invasive scavengers. Invertebrates and vertebrates consumed 55% and 10% more carcasses than invertebrates alone, respectively.
Researchers have discovered a crucial regulatory mechanism for sex determination in vertebrates, centered on the DMRT1 gene. The study found that the ncEx1 promoter sequence plays a vital role in regulating gene expression, particularly in germ cells and somatic cells.
Researchers have discovered a permanent coastal home for endangered leatherback sea turtles in the Mozambique Channel, revolutionizing conservation efforts. The turtles, known for their open-ocean migratory nature, are now found clustering together year-round in this area.
A global-scale survey of 100 snake species has found a larger number of snakes with a mutation that protects them from the deadly toxins stored in toad skin. The research reveals these mutations occur in a wider range of species than previously believed, challenging the initial assumption they were limited to toad-eating snakes.
Researchers found evidence of a diaphragm-like structure in early pelycosaurs, dating back over 300 million years. This discovery challenges previous assumptions about the evolution of respiratory systems and warm-bloodedness.
A new study reveals that the illegal snake trade in Australia poses a serious threat to human lives and the environment. The research found that 5 out of 28 alien species were likely to succeed in becoming established, while 10 out of 28 were venomous snakes.
Two new species of lizards, Liolaemus janequeoae and Liolaemus leftrarui, have been discovered in the Andean highlands of Southern Chile. These species were named after courageous tribal chiefs who fought against colonial Spaniards during the Arauco war.
Researchers used CT scans to investigate the origin of pre-mammalian therapsids' distinctive canines, finding they were not used for fighting but for display behavior. The study suggests sexual selection played a crucial role in the evolution of mammals, dating back 300 million years.
Researchers reconstructed the body cavity volume in over 120 tetrapods and found that herbivores have twice as large bodies as carnivores of similar size. The study reveals a fundamental difference in morphological principles between mammals and other tetrapods, with possible implications for respiratory systems.
A new research effort is underway in the Solomon Islands and surrounding nations to catalog biodiversity and study evolution. The project aims to fill gaps in data and test hypotheses using modern methods.
Researchers discovered that thorny devils can extract significant quantities of water from soggy sand, but not enough from dew. The lizards' skin is covered with microscopic channels that take up water by capillary action, allowing them to drink without licking water.