Scientific collections provide wealth of information on species' diet, breeding habits, growth rates, lifespan, and ecology. Collections have played crucial role in understanding climate change impacts and disease tracking, with discoveries like de-extinction of the Vegas Valley leopard frog.
A new analysis of cougar teeth found significant variation in dietary habits among the species, suggesting a more generalized approach that allowed them to survive the Pleistocene mass extinction. This contrasts with the more finicky diets of extinct cousins like saber-tooth cats and American lions.
Researchers estimate that a small village has only 40 members, making it highly vulnerable to extinction. Remote surveillance using satellite images can track the tribe's demographic health and movements without disrupting their lives.
A new study by Stanford researchers challenges the long-accepted island biogeography theory, which predicts a decline in species abundance in fragmented landscapes. Instead, they found that farmland and forest remnants in human-dominated landscapes can support higher species diversity and slow extinction rates.
A team of scientists ranked nearly 10,000 bird species by their evolutionary distinctness, identifying over 100 areas requiring additional protection to safeguard avian biodiversity. The study, published in Current Biology, reveals that Indonesia, Australia, and New Zealand are leading countries in preserving irreplaceable species.
A new study reveals that reef fish diversified into two distinct groups of fish, with the first group arriving around 70-90 million years ago, during a time when coral reefs were built by mollusks called rudists. By 50 million years ago, modern coral reefs and their inhabitants had largely taken shape.
Researchers found that woolly mammoths had a high incidence of abnormal neck vertebrae, including cervical ribs, which are often associated with inbreeding and environmental stress. This suggests that reproductive issues may have contributed to the mammoths' decline and eventual extinction.
After a 90% extinction event, large aquatic predators like crocodile-like amphibians emerged soon, followed by plesiosaurs and ichthyosaurs. Researchers found that apex predators recovered rapidly in the Early Triassic.
A study analyzing ancient DNA from over 250 radiocarbon-dated moa samples reveals that the iconic New Zealand bird was thriving when humans arrived, contradicting previous theories of population collapse before human arrival. The research suggests human activities contributed to the moa's extinction.
A study of 36 species found that climate change increases extinction risk by 28% by 2100, but existing conservation methods can identify vulnerable species. The research identifies key factors such as small range and population size that predispose species to high extinction risk.
Researchers at MIT determine the end-Permian extinction occurred over 60,000 years, killing 96% of marine species and 70% of life on land. The new timescale suggests massive volcanic eruptions from the Siberian Traps triggered a rapid collapse of global ecosystems.
Scientists analyzed bryozoan species before and after a mass extinction event, finding no significant change in body length. Maximum colony size declined in three out of four surviving types, suggesting the Lilliput effect may not be universal across organisms.
A new study finds that cone snail species are under increasing threat of extinction, with 67 species currently threatened or near-threatened worldwide. The loss of these creatures could rob future generations of an undiscovered reservoir of powerful neurotoxins used in life-saving drugs.
Researchers found that sulfur emissions from massive volcanic eruptions could have created widespread acid rain in the Northern Hemisphere, contributing to plant and organism extinctions. The acidity levels reached as low as pH 2 — comparable to undiluted lemon juice — potentially disfiguring plants and stunting their growth.
Researchers found that sulfur dioxide and carbon dioxide releases from Siberian volcanoes could have created acidic rain, damaging plants and organisms. The study suggests that ozone depletion and temperature increases contributed to the end-Permian mass extinction on land.
Scientists confirm the extinction of Darwin's frogs caused by chytridiomycosis, a fungal disease affecting amphibians. Conservation efforts are crucial to protect the remaining species, emphasizing the importance of preserving biodiversity.
A 250 million-year-old study suggests that Pangea integration led to environmental deterioration, causing the biggest mass extinction. The integration resulted in global-scale volcanic eruptions, greenhouse gas emissions, and changes in ocean chemistry, ultimately devastating land and marine ecosystems.
Scientists have documented a widespread extinction of bees that occurred 65 million years ago, concurrent with the mass extinction that wiped out land dinosaurs and many flowering plants. The findings shed light on the current decline in bee species and could provide insight into their current struggle.
The discovery of two new fossil jaws in Vellberg, Germany, provides evidence that the ancestors of lizards, snakes, and tuatara were alive during the Middle Triassic period. The findings suggest that lepidosaurs first appeared after the end-Permian mass extinction event, around 240 million years ago.
A new study from MIT reveals a gene essential for memory extinction, which could benefit people with posttraumatic stress disorder (PTSD). Enhancing the activity of this gene, Tet1, might make it easier to replace fearful memories with more positive associations.
Researchers at the University of Minnesota have developed an early-warning system to predict fishery collapse decades in advance, enabling conservation measures to be taken. The 'Eventual Threat Index' uses minimal data to identify conditions that would eventually cause a species to be overharvested.
A University of Adelaide study finds that Aboriginal populations and climate change were more likely responsible for the extinction of Tasmanian tigers and devils on the mainland. The research used complex models to recreate the dynamic interaction between dingoes, climate, and human populations.
NASA detects hundreds of fires in central Africa on August 21, 2013, suggesting deliberate agricultural burning to manage land and clear unwanted plants. The fires produce smoke degrading air quality and pose threats to species extinction.
A team of researchers studied anomodonts, ancient relatives of mammals, to understand their response to the largest mass extinction in Earth history. Despite ecological opportunities arising from species loss, anomodonts remained anatomically conservative and did not evolve new features.
Ray-finned fish, including species like Fouldenia and Styracopterus, rapidly diversified in the aftermath of the Hangenberg extinction. They exploited ecological opportunities to fill vacant niches, using their crushing jaws to prey on hard-shelled animals.
A new study found that birds can survive climate change through phenotypic plasticity, a flexibility in behavior. This adaptation enables them to track environmental changes, increasing their chances of survival. However, slow-reproducing species are more vulnerable to extinction due to the need for precise adaptations.
A 250-million-year-old burrow in South Africa's Karoo Basin has yielded a remarkable discovery: an injured amphibian, Broomistega, and its aestivating therapsid companion, Thrinaxodon. The fossilized remains suggest that short periods of dormancy and burrowing behavior helped mammal ancestors survive the Permo-Triassic extinction event.
UC Berkeley researchers found that a decrease in new species origins is crucial to extinction, alongside increased extinction rates. This study applies to slow changes over millions of years and provides insights into the pressures on modern flora and fauna.
New research from Ohio State University predicts that the growing human population will lead to an increase of 10.8% more threatened species by 2050. The study suggests that meaningful biodiversity conservation efforts must take into account the expanding human population footprint, which can exacerbate extinction threats.
A new study suggests that long-term antidepressant treatment impairs fear extinction learning in rats, which may disrupt the effectiveness of exposure therapy. The authors propose a mechanism involving decreased NMDA receptor subunits in the amygdala.
A study by scientists from the University of California, Davis predicts that 82 percent of California native fish will become extinct within the next century due to climate change. The research found that native freshwater species are particularly vulnerable to extinction, while non-native species are expected to thrive.
Researchers applied a novel method to assess extinction risk for bird species in the Atlantic Forest of Brazil, revealing two distinct groups: those with severe and mild fragmentation impacts. Out of 58 severely fragmented species, 28 are not currently considered threatened.
A Dartmouth College study suggests that many species of tropical lizards may not be on the brink of extinction due to climate change. The research found that high-resolution temperature measurements revealed varying effects on different lizard populations, contradicting previous predictions of widespread extinction.
A new species of ichthyosaur from Iraq, named Malawania anachronus, has been discovered, contradicting previous theories on the evolution and extinction of these ancient marine reptiles. The discovery reveals that ichthyosaurs remained diverse during the early part of the Cretaceous period.
A recent review of evidence suggests that humans were unlikely to have been the primary drivers of megafauna extinction in Australia, with climate change instead being the main culprit. The study challenges long-held assumptions and highlights the complexity of this issue.
A new study found that a yeast colony dominated by non-producers is more likely to face extinction than one consisting entirely of producers. The researchers discovered that even a small proportion of 'cheaters' can disrupt the social unit's survival, highlighting the central dilemma in the evolution of cooperation.
Scientists have discovered new fossils showing that dinosaur predecessors were more widespread than thought after the mass extinction event. The findings suggest that archosaurs, a group including crocodiles and dinosaurs, diversified in Tanzania and Zambia before becoming more widely distributed.
Fossil records from Tanzania and Zambia reveal a lineage of animals thought to have led to dinosaurs, contradicting previous assumptions about their predecessors' fate. The discovery provides new insights into the recovery of animal communities after the mass extinction.
Researchers investigate how surface-derived fluids can penetrate deep levels in Earth's crust, a challenge to widely accepted notions. They also explore the kill mechanism for a mass extinction event and the formation of hydrothermal base metal ore deposits. Additional studies focus on polar reversals, earthquakes, and archeological fi...
A new study reveals that proportions of threatened species are more closely related to socio-economic pressures from the early 20th century. This 'extinction debt' implies that current conservation efforts may underestimate true extinction risks, as many species may already be destined for extinction due to temporal delays.
Research by Alison Boyer found that nearly 983 land bird species became extinct between the first human arrival and European colonization due to overhunting, forest clearance, and introduced species. The study also reveals that flightless species were more likely to go extinct than those with flying abilities.
A massive extinction event occurred 200 million years ago, wiping out 76% of species on Earth. Volcanic eruptions from the Central Atlantic Magmatic Province likely triggered the event through global warming and ocean acidification.
The end-Triassic extinction was caused by widespread volcanic eruptions in the Central Atlantic Magmatic Province, which spewed forth huge amounts of lava and gas. The eruptions occurred precisely when the extinction began, providing strong evidence that they triggered the event.
A University of Florida study of nearly 5,000 Haiti bird fossils shows that human arrival did not cause simultaneous bird extinction, contradicting a commonly held theory. The research provides range and dispersal patterns from A.D. 600 to 1600, which may be used to create conservation plans for tropical mountainous regions.
A new study ties gigantic volcanic eruptions to the abrupt disappearance of half of Earth's species 200 million years ago, potentially on a pace similar to human-influenced climate warming today. The eruptions caused sudden climate changes that may have prevented many creatures from adapting.
An international team led by UCSC biologist Barry Sinervo is investigating how climate change affects plant communities and animal populations globally. The study will evaluate the effects of changing temperatures on local populations of lizards, frogs, fish, and other vertebrates.
A new study suggests that climate change may lead to the extinction of dozens of lizard species within the next 50 years due to rising temperatures. Lizards with viviparous reproduction are particularly vulnerable as changing weather patterns affect their ability to adapt and survive in cold environments.
Researchers found that reducing the population size of one carnivore can cause another similar species to become extinct due to changes in food webs. This highlights the need for an ecosystem-based approach to conservation.
A new study suggests that scopolamine can help boost the effectiveness of exposure therapy for anxiety disorders by disrupting contextual processing. Researchers found that administering scopolamine to rats during anxiety-extinction led to fear-recovery being thwarted, suggesting a potential breakthrough in preventing relapse.
Biologists at the University of Washington have found that mutant bacteria can escape extinction when environmental conditions worsen gradually or moderately. The study shows that 'relay team' of mutations emerging under these conditions provides protection against extreme stress, increasing chances of survival.
A new study reveals that nearly 1 in 5 reptiles are struggling to survive, with many species highly specialized and sensitive to environmental changes. The findings highlight the urgent need for conservation action to address habitat loss, hunting, and other threats, particularly in tropical regions.
Researchers found that most tough-leaved shrubs and trees in South East Australia went extinct during the ice ages, contradicting the long-held theory that evolution drives biodiversity. The study suggests that extinction is equally important to diversity as evolution.
A recent study published in Biological Psychiatry reveals that scopolamine can rapidly improve mood in depressed patients. Additionally, the drug shows promise as a treatment for anxiety disorders by disrupting contextual processing during extinction learning.
A University of Toronto Scarborough researcher helped create a family tree of placental mammals, placing humans in the tree of life. The study used genetic and physical traits to conclude that placental mammals diversified much later than previously thought, with all major groups alive today originating after the dinosaurs' extinction.
A team of scientists, led by University of Florida researchers, has generated the most comprehensive tree of life on placental mammals, which includes humans. The study reveals that these mammals diversified after the extinction of dinosaurs 65 million years ago.
Scientists have determined the most precise dates yet for the dinosaur extinction and a comet or asteroid impact, which occurred around the same time. The revised dates clear up lingering confusion over whether the impact occurred before or after the extinction.
A new population modelling approach contradicts the widespread belief that disease must have been a factor in the thylacine's extinction. The study found that European settlement, including hunting and habitat loss, was powerful enough to drive the species to extinction without invoking a mystery disease.
Despite concerns about high extinction rates, Griffith University researcher Professor Nigel Stork says the actual number is lower than feared. The study estimates around 5 million species on Earth, with conservation efforts protecting rich biodiversity in key areas.
A study found that invasive plant invasions can create 'extinction debts' in native plant species, leading to slow extinctions but delayed actual extinction events. Native plants are often relegated to marginal habitats unsuitable to their non-native competitors.
Researchers found that invasive plants will likely extinguish native plants in the wild over time, contrary to recent reports. The 'extinction debt' occurs hundreds of years after initial invasion, where native species slowly go extinct but not immediately.