A new study reveals that American mastodons took frequent trips north when the climate changed, with northern populations being less genetically diverse and more at risk of extinction. The research suggests that examining how different species responded to climate change can provide valuable insights for modern conservation efforts.
A newly described species from Madagascar suggests that dinosaurs and pterosaurs originated from extremely small ancestors. The discovery sheds light on the origins of flight in pterosaurs and the presence of 'fuzz' on the skin of both groups.
Scientists have found that the first dinosaurs laid soft-shelled eggs, contradicting long-held assumptions. The study analyzed the eggs of two non-avian dinosaurs and found they resembled those of turtles in terms of microstructure and mechanical properties.
A new study models the life cycle of cataclysmic binaries, confirming that observable novae are just a small fraction of these systems. The research shows that most binaries spend 90% of their lifetimes in a detached state, waiting to be detected.
New study finds that populations of native fish species on both sides of Niagara Falls are genetically distinct, indicating no significant interbreeding or migration past the falls. This suggests that the falls and Welland Canal serve as effective barriers to prevent invasive aquatic species from entering the Great Lakes.
Researchers analyzed 98 historic specimens to find that different plumage patches evolved independently through time, with face and head patches evolving for mate recognition and back and wing patches for camouflage. This 'mosaic evolution' explains the lorikeets' dazzling color diversity while avoiding predators.
A new study analyzes ancient packrat middens for DNA, revealing a mix of bacterial and eukaryotic organisms, including plants and vertebrates. The findings provide valuable insights into past ecosystems and the impact of human-caused climate change.
Two brown dwarfs, one about 34 times the mass of Jupiter and the other about 72 times the mass, are found to be linked despite being 341 astronomical units apart. The discovery confirms that brown dwarf systems can be very low-mass and extremely far apart yet connected.
A new study suggests that researchers might be able to detect black hole mergers by observing the effect of their merger on a nearby gas disk. If successful, this would allow astronomers to pinpoint the cosmic location of these events and study them in greater detail.
A new study on a well-preserved femur fossil suggests that apes, humans, and Old World monkeys developed distinct hip joint morphologies, likely adapted to their respective environments. The findings imply that navigating the environment played a key role in driving the divergence of these primates.
A new study on a 20-million-year-old fossil from South America reveals that the brain evolved repeatedly and independently in monkeys, with some early members having more complex brains than previously thought. The research also sheds light on the visual-olfactory trade-off in primate evolution.
Researchers observe thousands of flashlight fish synchronizing their movement and facilitating schooling behavior in complete darkness. This study reveals a novel function for bioluminescence in the ocean, showing that fishes can school using only their natural light, without relying on ambient light.
Researchers used parasitic bat flies to study buffy flower bat populations in the Bahamas, finding a single population of bats but two populations of their flies. The study suggests that ocean channels may not be universal barriers for bats, with limited gene flow over two years.
A new paper reconstructs the ancient Trans-Saharan Seaway, revealing massive climate and sea level changes that occurred 50-100 million years ago. The research also discovers giant sea snakes, catfish, and extinct fishes, highlighting the dynamic nature of Earth's evolution.
Researchers built a phylogenetic tree based on DNA from newly collected anemone specimens to fill gaps in the origin of these species. They found that as a group, anemones independently evolved the ability to host clownfish three times throughout history, with two groups originating in the Tethys Sea.
New molecular evidence contradicts long-held views on sloth relationships, suggesting that tree sloths and extinct kin are more closely related than previously thought. The research uses both mitochondrial genome and protein collagen data to support convergent origins of adaptations in the six living tree sloth species.
Researchers used biomechanical modeling to determine that the Leptarctus primus skull is most similar to an American badger's, indicating a primarily carnivorous diet but also potential for omnivory. The study uses CT scans and virtual modeling to reconstruct feeding habits in extinct animals.
Researchers found that genetics and vocal behavior show distinct patterns in two desert populations, suggesting speciation is underway. The study's findings indicate that dialect differences might indeed be indicative of new species.
Researchers at the American Museum of Natural History have identified a unique enzyme responsible for the bioluminescence in Bermuda fireworms, which powers their dramatic mating display. The study also examines genes related to reproductive timing and changes in the animals' bodies before swarming events.
A new study reveals the largest dinosaur foot ever found, measuring nearly 1 meter wide, and confirms that brachiosaurs inhabited a huge area in North America. The discovery also sheds light on the range of sauropod dinosaurs during that time.
A new study challenges the long-held assumption that plant-eating mammals' diets can be determined by analyzing carbon isotopes in fossil teeth. The researchers found that the value of these isotope analyses changes with body size, leading to a more accurate understanding of extinct species and ecosystems.
Researchers have uncovered five new species of snail-eating snakes with peculiar dining habits, which are considered endangered or vulnerable due to habitat destruction. The study presents a new evolutionary tree for the diverse group of snail eaters in Central and South America.
Researchers have created the most comprehensive tree of life for malaria parasites, revealing diverse evolutionary lineages and proposing that some species should be renamed. The study included DNA sequence data from over 20 genes and sampled 58 malaria species across eight genera, correcting for biased DNA ratios.
A 1.5-foot-long fossil slab, misidentified twice, has been reinterpreted as a large cartilaginous fish with characteristics similar to sharks and rays. The study suggests the fish lived between 70-85 million years ago and expands the diversity of the Niobrara fauna.
A new study confirms the value of iDNA methods in biodiversity surveys, identifying certain ground birds and bats for the first time. Leeches can be used to survey more rapidly and confidently identify small mammal species, making them an extremely useful tool for conservation purposes.
A computational model predicts which organisms can engage in phagocytosis, a process vital for immune defenses and nutrient uptake. The model's findings suggest that phagocytosis may have arisen after the combination of archaeal and bacterial components in eukaryotic cells.
Researchers create biomechanical models to test how ecological factors like age at sexual maturity and average precipitation influence skull shape in carnivoran species. The study reveals that nondietary factors significantly impact both skull form and function, surpassing dietary influences.
Researchers have discovered that modern cheetahs possess a distinct vestibular system in their inner ear, which enhances sensitivity and rapid responses to head motions. This unique anatomy allows the cheetah to maintain its gaze locked on prey during high-speed hunts.
A new study published in Science Advances suggests that the emerging snake fungal disease could infect all snakes globally, regardless of their ancestry or habitats. The disease, caused by Ophidiomyces ophidiodiicola, primarily affects snakes' skin, leading to lesions and potentially deadly outcomes.
A new study suggests that standard ways of measuring well-being and sustainability in communities may be missing critical information, leading to missteps in management actions. The authors propose alternative approaches using indicators grounded in the values of a particular community.
Researchers found the common ancestor of apes to be small, probably weighing around 12 pounds, contrary to previous suggestions. This discovery has implications for understanding the evolution of human family trees and behavior such as suspensory locomotion.
Exceptionally preserved trilobite fossils reveal that at least two species evolved a stomach structure 20 million years earlier than thought. This discovery contradicts previous assumptions about trilobite digestive systems and evolution, suggesting a more complex evolutionary history.
A team of researchers has recovered the location of a nova that was first spotted by Korean astrologers in 1437, providing evidence for a long-term life cycle with multiple stages. The study supports the idea that novae undergo smaller-scale eruptions after fading to obscurity for thousands of years.
A recent study published in Scientific Reports reveals that shotgun sequencing, a favored method for measuring microbial biodiversity, is not as accurate as once thought. Amplicon sequencing, on the other hand, revealed more than twice the number of phyla and 27% more families in water samples from Brazil's major river floodplain systems.
A team of citizen scientists using a new tool discovered a previously unknown brown dwarf, about 100 light years away from the Sun. The object was confirmed via an infrared telescope and published in the Astrophysical Journal Letters.
Research on La Brea Tar Pits fossils suggests LA's climate has remained relatively stable for 50,000 years. The study analyzed ground and darkling beetle fossils using radiocarbon dating, revealing three semi-continuous age ranges that indicate a warmer and drier climate similar to today.
A green alga living in the cells of spotted salamanders undergoes molecular changes that stress its energy production, while salamander cells remain unaffected. The symbiotic relationship is unusual and may have implications for other symbiotic systems.
A new study confirms that sharks arose from a group of bony fishes called acanthodians, using an extraordinarily well-preserved fossil of an ancient sharklike fish. The research identifies the fossil as an important transitional species pointing to sharks as acanthodians' living descendants.
A genomic study in the lower Congo River finds that fishes are evolving into distinct species due to the intense hydraulics of the river's rapids and deep canyons. The researchers discovered that fishes living less than a mile away from their relatives are exchanging few genes, indicating strong genetic separation.
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.
A new study by the American Museum of Natural History estimates that there are approximately 18,000 bird species worldwide, nearly twice as many as previously thought. The researchers used a combination of morphology and genetic studies to highlight birds with separate evolutionary histories.
A new study reveals that ice age vertebrate species in the eastern US responded to glacial cycles and global warming in different ways. The research found that about 75% of animals expanded their populations, while 25% contracted, suggesting additional complexity in climate change impacts.
A genetic survey of nearly 450 jaguar scat samples found moderate levels of variation, with low diversity in Mexico and Honduras. The study suggests limited gene flow between Selva Maya and Honduran jaguars, emphasizing the need for conservation efforts to reconnect populations and mitigate human-wildlife conflict.
Research finds yellow-bellied kingsnake has three subspecies with distinct habitats on each side of the Mississippi, challenging long-held biodiversity theory. This discovery highlights the importance of understanding ecological environments in shaping species diversity.
Astrophysicists propose that inspiraling white dwarfs could produce a type of explosion that matches Type Ia supernovae. The model suggests that resonance in the binary orbit of the stars causes rapid jumps in energy that can lead to detonation.
Research reveals three common burrow features: a horizontal platform for monitoring and warming up, spiral bends to deter predators, and an enlarged terminal chamber for refuge and feeding. Burrow architecture may change in response to soil composition, hardness, and moisture.
A study using a custom-built 'shark-eye' camera reveals that biofluorescence makes catsharks more visible to neighbors of the same species at depths where they live. The researchers found that the contrast of patterns on the biofluorescent sharks increases with depth, suggesting they may use it to communicate with one another.
Researchers found that young birds can produce mature flight strokes despite underdeveloped muscles and wings. Leg-wing cooperation enables juvenile birds to flap like adults, improving traction as they climb.
A 13-million-year-old fossil discovery suggests that South American and Indian species evolved separately to acquire protruding, 'telescoped' eyes. This finding provides insight into the parallel evolution of long-snouted gavialoids in these regions.
New research suggests that human brain size and body size are genetically linked, with increased brain size leading to a correlated response in body size. This phenomenon played a significant role in the evolution of larger brains and bodies in humans.