A 95-million-year-old Cretaceous African amber deposit reveals new fossils of insects, spiders, and bacteria, providing insights into an ancient tropical forest and the diversification of flowering plants during this time. The discovery is significant, as it is the first major find from the African continent.
Researchers found that toad populations in Italy shifted their behavior from breeding to evacuation mode five days before a significant earthquake. The ionosphere disruptions detected pre-seismic cues like radon gas releases and charged particles, allowing the toads to detect earthquakes earlier.
Researchers found that domestic guinea pigs excelled in a water maze test due to their improved ability to decipher guidance symbols, while wild cavies were stronger swimmers. The study suggests an adaptation in domesticated animals for efficient problem-solving in human-made environments.
A University of Melbourne-led study links earlier butterfly emergence with regional human-induced climate change, revealing a causal link between increasing greenhouse gases and warming temperatures. The study found a 1.6-day shift in the mean emergence date for adults of the Common Brown butterfly over a 65-year period.
A phylogenetic analysis of Mexican cave scorpions reveals that specialized adaptations can be reversed through independent evolution. Three surface-living species evolved from cave-dwelling ancestors, highlighting the flexibility of scorpion biology.
A UBC researcher warns that allowing one-off sales of ivory could stimulate the illegal market, leading to increased poaching in Africa. The researcher emphasizes the need for robust monitoring and enforcement of the ivory trade before permitting such sales.
Scientists at the Phyletic Museum of Jena University are using MicroCT imaging to analyze insect genital morphology. The research aims to shed light on the key-lock principle, which explains how male and female reproductive organs fit together, and instead reveals that it's a result of sexual selection.
Researchers found that birds leave messages in the egg that influence the development of their chicks' begging behavior. The messages can affect the chick's weight gain and survival after hatching.
Researchers at the Max Planck Institute for Chemical Ecology discovered that desert ants can locate odour sources in a map-like manner and use this information for navigation. The ants need both antennae to smell the scenery in stereo, enabling precise location of their nests after foraging for food.
A new study found that fruit flies without the key gene controlling circadian rhythms were more resilient to stress at a young age, but their health declined faster as they aged. The research suggests that biological clocks may play a role in aging and health, with intact genes potentially improving health and longevity.
A study by Harvard University researchers reveals that changes in beak length and depth can explain the morphological diversity of Darwin's finches. The team used mathematical models and genetic analysis to show that scaling transformations, shear, and gene expression are key factors in shaping the birds' beaks.
The giant panda genome study has identified genetic traits that may aid in understanding the animal's unique bamboo diet and inform conservation efforts. The research found that pandas lack genes necessary for competing digestion of bamboo, suggesting a reliance on microbes to digest this staple food source.
Researchers from the University of Innsbruck have identified a primitive cancer gene in a fresh water polyp, revealing similar biochemical functions to those found in humans. This discovery sheds light on the evolution of cancer and its relationship to stem cells.
A new analysis of a fossil specimen called microraptor suggests that small, feathered species must have been gliders that came down from trees. The research supports the idea that some species believed to be dinosaurs may have descended from birds.
Research by Tel Aviv University's Prof. Yoram Yom-Tov reveals that animals at higher latitudes are adapting to rising temperatures by altering their diets and body sizes. This adaptation is seen in birds getting smaller and mammals getting bigger, allowing them to cope with warmer temperatures.
Researchers found tiny genetic regions, or hotspots, responsible for the butterflies' identical wing patterns, challenging previous assumptions about evolution. The study reveals a flexible genetic mechanism underlying this remarkable example of adaptation.
Researchers reconstruct primate brain evolution to clarify the Hobbit's brain size, suggesting a strong selective advantage for increased brainpower. The study supports the hypothesis that the Hobbit's small brain was adapted to local ecological conditions on Flores.
Researchers found that male sabertoothed cats were indistinguishable in size from females, suggesting a possible lack of aggression. This contrasts with the American lion, where males are significantly larger and more aggressive than females.
A team of researchers from Harvard University discovered that army ant colonies can be cooperative instead of combative when they lose their queen. The lost workers are absorbed by neighboring colonies and integrate quickly, often losing their distinct colony odor within days.
Scientists at Michigan State University are developing robotic fish that use advanced materials to swim like fish and monitor water quality. The robots will carry sensors recording temperature, dissolved oxygen, pollutants, and harmful algae, providing a high spatial and temporal resolution of data.
Researchers from the University of Adelaide have published unique research data on the world's only monotremes, providing new light on the platypus sex chromosome system. The team discovered a complex mechanism where sex chromosomes pair during sperm development in platypus.
A new species of fly discovered in Burmese amber had a unique horn and three eyes on top, suggesting it was an evolutionary dead end that later disappeared. It likely fed on tiny flowers and had other unusual characteristics.
Researchers Lawrence Weider and Amy V. Callaghan will investigate how aquatic organisms cope with drastic environmental changes caused by nutrient pollution. The study targets lakes in Canada and Minnesota, where Daphnia diapausing eggs have remained dormant for over 50 years.
Researchers at the University of Gothenburg have discovered nine new bristleworm species that feed on dead whales, highlighting a previously unknown food source in marine ecosystems. The study reveals these specialized organisms play a significant role in nutrient cycling and ecosystem balance.
Scientists have cracked the code of insect flight, revealing complex wing designs that defy conventional aerodynamics. By studying locusts and developing a computer model, researchers gained insights into wing deformation and its impact on flight efficiency.
A study led by biologists at UC Berkeley found that 48 out of 53 bird species in California's Sierra Nevada mountains have adjusted their ranges in response to climate change, with some moving towards warmer temperatures and others preferring wetter conditions. The researchers used data from a survey of 82 sites and compared past and p...
A Tel Aviv University study suggests that men's bodies have become 'reproductive antagonists', producing aggressive sperm to compete with women's bodies, which defend against them. This evolutionary arms race may be contributing to high rates of unexplained infertility.
A study tracked genetic mutations in a roundworm over 5,000 years, finding that oxidative DNA damage is a primary cause of mutations. The research also showed that natural selection affects previously thought-to-be 'junk' DNA, suggesting new biological roles.
A new study re-examines Kammerer's experiments and finds remarkable resemblances to newly discovered aspects of epigenetics. Kammerer's data shows consistency with current epigenetic mechanisms, providing new biological arguments in favor of the authenticity of his midwife toad experiments.
SourceWiley·JournalJournal of Experimental Zoology Part B Molecular and Developmental Evolution·DateSep 2, 2009
A new revision of the Dioptinae subfamily sheds light on the diversity of tropical moth species, revealing a unique story of parallel evolution. The study found that around 500 species evolved from a common ancestor into diverse butterfly mimics, with some feeding on toxic plants to gain protection.
A Tel Aviv University researcher suggests that tears signal vulnerability and attachment, making interpersonal relationships stronger. Crying is not just a symptom of pain or stress, but an evolution-based mechanism to bring people closer together.
New research reveals that young muskoxen are not thermally stressed more than adults in extreme cold. The study found that calves and adults sacrifice only a small percentage of their daily energy intake to heat loss during foraging bouts.
Researchers discovered that insect circadian rhythms affect pesticide susceptibility, with defenses strongest during mid-day and weakest around dawn or dusk. This knowledge may lead to improved pest control strategies and reduced pesticide use.
Researchers at UBC found a mutant gene in freshwater sticklebacks that drives their tendency to relocate instead of adapting to new environments. This 'wanderlust gene' is associated with the loss of bony lateral plates and affects salinity tolerance.
Research by Dr. Amber Teacher reveals that wild frog populations in the UK are changing their mating behaviour in response to Ranavirus infection, with healthy frogs selecting mates based on their Major Histocompatibility Complex (MHC) type.
A recent study suggests that chimps respond to faces in a similar manner to humans, capturing attention more effectively than other objects. Reaction times improved when the target appeared behind the image of a chimpanzee face.
Researchers at Uppsala University analyzed DNA from shed hairs in a book owned by Nicolaus Copernicus, finding two hairs with matching profiles to the putative remains. The results were confirmed by analysis of tooth and bone tissue from the same location.
A study by French and American scientists found that enzyme synthesis of steroids in humans is unrelated to those in insects, snails, octopuses, and corals. This discovery suggests a 'snail-centered viewpoint' for understanding the effects of environmental chemicals on steroid synthesis.
A new study by George Mason University researchers challenges the long-held notion that dinosaurs were massive creatures. They found that using a flawed statistical model led to overestimations of dinosaur weight, revealing some species may have been smaller than initially thought.
A study by US-based researchers found that great white sharks use highly focused hunting methods, comparable to those of serial criminals. The research used geographic profiling techniques to analyze shark attack data and located the anchor point for younger sharks.
Scientists re-examined data to discover a flawed statistical model used for calculating dinosaur mass, leading to revised estimates of Apatosaurus louisae at 18 tonnes instead of 38 tonnes. This finding has significant implications for various theories about dinosaur biology.
Research by Suzanne Peyer reveals that zebra mussels' ability to produce strong 'byssal threads' enables them to attach securely in fast-moving waters, outperforming quagga mussels. This adaptation allows zebra mussels to thrive in rivers and streams, whereas quagga mussels are more commonly found in calm lake waters.
A new study published by Oregon State University researchers found that hatchery fish significantly impair the reproductive fitness of their offspring, even if they survive and reproduce in the wild. This could be hurting efforts to sustain wild salmon runs, scientists said.
Researchers at Oregon State University have made a groundbreaking discovery about bird physiology, finding that birds' lung structure and musculature are critical to their flight capacity. This study suggests that birds did not descend from theropod dinosaurs but instead evolved on a parallel path.
Dr. Jonathan Losos has made significant contributions to the knowledge of Caribbean ecosystems through his research on anole lizards. His work highlights the importance of natural selection, competition, and niche evolution in shaping assemblages of Anolis species.
A UBC paleontologist has solved the enigma of a massive bonebed in southern California by proposing that it formed over a 700,000 year time-span approximately 15 million years ago. The team found only five shark bite specimens out of over 3,000 bones and teeth analyzed, supporting the deposit-over-time theory.
A comprehensive investigation into sea urchins' axial complex has shown that various internal organs are structurally linked. The study uses high-resolution imaging to analyze specimens from multiple orders, providing a re-evaluation of published studies spanning two centuries.
Researchers at UBC found that warmer, more acidic waters enable Purple Ochre Sea Stars to grow twice as fast as normal over 10 weeks. This discovery complicates current assumptions about climate change's impact on marine species.
Scientists have shed light on the collapse of coral reefs, revealing their genetic complexity and intricate symbiotic relationship with algae. The delicate communication process between the coral and algae is also being stressed by global change, leading to coral bleaching and collapse.
A new study reveals that mother birds provide an early advantage to extra-pair offspring, giving them a size and survival advantage over their half-siblings. This non-genetic effect is attributed to the laying order of eggs, with extra-pair chicks hatching earlier than within-pair chicks.
Research on cabbage looper caterpillars reveals that dietary bacteria can alter gene expression in metabolism, homeostasis, and immunity. The insects' ability to fine-tune their natural defenses through gene regulation may provide a survival advantage.
A new study reveals widespread and substantial declines in wildlife populations in Kenya's Masai Mara National Reserve. The researchers found that a growing concentration of human settlements near the reserve is linked to large losses of wildlife, including giraffes, hartebeest, impala, and warthogs.
Researchers found that chameleons alter their sunbathing behavior in response to their dietary vitamin D intake, regulating UV exposure to maintain optimal levels. The study showed remarkable accuracy in the chameleons' ability to gauge and adjust their UV exposure based on internal vitamin D levels.
A recent study published in Science found that Ichthyostega, a four-limbed animal with backbones, may have been the more primitive form, acquired terrestrial habits later in development. In contrast, Acanthostega's limbs showed more similarities to earlier fish fins, indicating it may have returned to an aquatic lifestyle.
The study provides a comprehensive map of global malaria endemicity, revealing areas where malaria control can be improved and areas where elimination may be possible. The map uses model-based geostatistics to incorporate data from local surveys, providing an important resource for policymakers and researchers.
A new study published in the Journal of Human Evolution shows that human running efficiency changes with speed and has an optimal pace for covering distance with least effort. The most efficient running speed averaged around 8.3 miles per hour for males and 6.5 miles per hour for females.
Researchers found diatoms in freshwater and marine environments have distinct size patterns due to nutrient availability, with larger sizes thriving in oceans. Climate change could alter mixing depths and nutrient delivery, potentially reducing carbon sequestration efficiency.
A recent study published in Physiological and Biochemical Zoology found that mice with increased metabolism live just as long as those with slower metabolic rates, casting doubt on the rate-of-living theory. This contradicts the idea that faster living animals die young.
A study by Purdue University researcher Robert Swihart found that pine voles prefer oak roots over other tree roots, causing high mortality rates among oak seedlings. The rodents cause more damage to white oak roots than other trees, potentially leading to a decline in oak availability.
A foreign virus called Ranavirus is devastating frog populations in the UK, killing tens of thousands each year. The frogs' immune system has responded by changing a gene called MHC, which codes for a major part of their immune system.