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Jefferson scientists create first transgenic mouse model of hepatitis B-based liver disease
Researchers at Jefferson Medical College have developed the first mouse model of chronic liver disease caused by hepatitis B virus (HBV), which promises to accelerate the discovery of drugs against the disease. Such a model may provide a better understanding of how HBV actually causes liver disease. (1999-07-28)

Highway deaths highest for males - Male urban squirrels, that is
A year-long study on the Texas A&M University campus showed that males are more likely than females to die on the road, and scientists believe it's because the males dart about through the streets more. But wait. It was urban squirrels, not students, who were radio-tagged and followed by Dr. Roel Lopez, wildlife assistant professor, both to find out about the 350-or-so fox squirrels on the campus and to teach undergraduate students how to trap, handle and monitor animals. (2003-04-29)

New U of M start-up may save lives of victims of massive blood loss and trauma
A new technology from the University of Minnesota has resulted in a start-up that may help prolong the lives of victims suffering from massive blood loss or trauma. The university's Office for Technology Commercialization has signed a license agreement with Denver-based Ariel Pharmaceuticals authorizing the private company to develop and commercialize the therapy. (2011-10-18)

Fish was on the menu for early flying dinosaur
University of Alberta-led research reveals that Microraptor, a small flying dinosaur, was a complete hunter -- able to swoop down and pick up fish. (2013-04-22)

Recent, rapid climate change is driving evolution of animal species
Rapid climate changes over the past several decades have led to heritable, genetic changes in animals as diverse as squirrels, birds and mosquitoes, according to University of Oregon evolutionary geneticists. (2006-06-08)

Novel anti-cancer mechanism found in long-lived rodents
Biologists at the University of Rochester have found that small-bodied rodents with long lifespans have evolved a previously unknown anti-cancer mechanism that appears to be different from any anti-cancer mechanisms employed by humans or other large mammals. The findings are published in today's issue of Aging Cell. (2008-09-18)

Whitebark pine trees: Is their future at risk?
There's trouble ahead for the whitebark pine, a mountain tree that's integral to wildlife and water resources in the western United States and Canada. Over the last decade, some populations of whitebark pines have declined by more than 90 percent. But these declines may be just the beginning. (2013-06-10)

University of Chicago researchers reveal secrets of snake flight
On the cover of the May 15, 2005, issue of the Journal of Experimental Biology, University of Chicago researchers described the effects of size and behavior of flying snakes, and found that the smaller animals were better gliders. (2005-05-11)

Study sheds light on squirrel psychology
The ability of grey squirrels to learn from observing others is highlighted in a new study The research shows how squirrels can quickly learn from watching their peers, particularly if it relates to stealing food. The research adds to growing evidence that animals are primed to learn quickly about what is most important to their survival and that they learn by observing others. It is the first study to test the ability of gray squirrels to learn from observation. (2009-07-28)

Squirrels winning at outwitting trees' survival strategy
In Science, Andrew McAdam at Michigan State outlines how red squirrels have figured out a way around the elaborate ruse trees have used to protect their crops of tasty seeds. The remarkable part: The squirrels are divining the arrival of bumper crops of spruce cones months before the cones ever materialize and then betting on those crops with the most expensive evolutionary collateral -- a second litter of pups. (2006-12-21)

New and improved test for West Nile virus in horses
A new test for West Nile virus in horses that could be modified for use with humans and wildlife may help track the spread of the disease, according to an article in the September issue of the Journal of Medical Microbiology. (2008-08-19)

Animals successfully relearn smell of kin after hibernation
Animals can re-establish their use of smell to detect siblings, even following an interruption such as prolonged hibernation. Smell is an important animal survival tool. Female ground squirrel sisters bond for protection and use smell to recognize each other. Animals also need to recognize siblings to avoid inbreeding, which would have a negative effect on their genetic fitness. The research on how animals recognize kin is vital to helping plan conservation programs for endangered species. (2009-02-13)

Cellular membrane changes associated with acclimation to cold
Scientists at the National Institutes of Health (NIH) have discovered a cellular mechanism in hibernating ground squirrels that may protect the nervous system from being damaged during extreme cold and lowered body temperatures, called hypothermia. (2000-09-19)

Research shows rats have best bite of rodent world
Scientists at the University of Liverpool have found that mice and rats have evolved to gnaw with their front teeth and chew with their back teeth more successfully than rodents that 'specialize' in one or other of these biting mechanisms. (2012-04-27)

Study: Wolverines need refrigerators
A new study released by the Wildlife Conservation Society and partners says that the distribution of wolverines in the wild relates to the species' ability to store and (2012-07-12)

Penn researcher traces the history of the American urban squirrel
In his latest publication, Etienne Benson, an assistant professor in the University of Pennsylvania's Department of History and Sociology of Science, examined how squirrels found homes in American cities, and how the presence of the now-ubiquitous bushy-tailed critters altered people's conceptions of nature and community. (2013-12-06)

NIH fellowship recipient to study disease ecology
Camille Harris of Ridgeland, Mississippi, a graduate student in biological sciences at Virginia Tech, has been awarded a National Institutes of Health Graduate Research Fellowship for her study of forest disturbance and its ecological impacts on LaCrosse virus, a mosquito-borne disease that can cause seizures, coma, paralysis, and permanent brain damage in severe cases. (2009-09-25)

Hot pepper oil may prevent salmonella in poultry
Adding capsaicin, the spicy component of peppers, to the diet of neonatal broiler chicks appears to increase their resistance to Salmonella. (2001-08-17)

Thieving rodents: Did they save tropical trees?
Big seeds produced by tropical trees such as black palms were probably once ingested and then left whole by huge mammals called gomphotheres. (2012-07-17)

Stroke and SIDS in Alaska topics of neuroscience conference
University of Alaska Fairbanks neuroscientists studying stroke and Sudden Infant Death Syndrome will present their research findings at the 7th Conference of the Specialized Neuroscience Research Programs in New York, Aug. 19-22, 2008. (2008-08-19)

Arctic ground squirrels muscle up to hunker down
When Arctic ground squirrels are getting ready to hibernate they don't just get fat -- they pack on muscle at a rate that would make a bodybuilder jealous. And they do it without suffering the harmful effects that high levels of testosterone and other anabolic steroids usually cause. University of Toronto Scarborough (UTSC) researchers have started to untangle how the squirrels manage it, and their results could someday have implications for human health. (2011-09-15)

UC Davis researchers identify dominant chemical that attracts mosquitoes to humans
Scientists at the University of California, Davis, have identified the dominant odor naturally produced in humans and birds that attracts the blood-feeding Culex mosquitoes, which transmits West Nile virus and other life-threatening diseases. The groundbreaking research, published this week in the early online edition of the Proceedings of the National Academy of Sciences, explains why mosquitoes shifted hosts from birds to humans and paves the way for key developments in mosquito and disease control. (2009-10-26)

Study shows grey squirrels are quick learners
They may be viewed by some as an invasive species or a commonplace pest of public parks, but a new study from the University of Exeter has shown that grey squirrels are actually quick learners capable of adapting tactics to improve efficiency and reap the best rewards. (2015-07-06)

Suppression Of Natural Fires Harms Squirrels
Cornell University biologists who study dwindling populations of a rare ground squirrel in Idaho have found another reason to let (1999-05-03)

EPA funds ground-breaking Lyme disease research
In the U.S, Lyme disease is the most frequently reported disease that can be passed from animals to humans. These animal-borne diseases can make people very sick, and proper anticipation of disease outbreaks and effective intervention are crucial to protecting the public. Scientists at the Cary Institute of Ecosystem Studies in Millbrook, NY recently received $750,000 in grant funding from the US Environmental Protection Agency to help safeguard human health by gaining a better understanding of the Lyme disease life cycle. (2008-07-31)

Unconventional experimental design
Over two years of observation McRae, working closely with professor of biology Steven Green, found that he could quite accurately predict what type of predator was threatening a squirrel by analyzing its sounds and tail movements. (2014-10-21)

Biodiversity may reduce Lyme disease
It's well-known that biodiversity makes ecosystems healthier. But new research shows that biodiversity may make people healthier too. People are less likely to get Lyme disease if they live in areas with a greater diversity of small mammals, according to the June issue of Conservation Biology. (2000-06-04)

Ecotourism can put wild animals at risk, scientists say
Biologists who analyzed more than 100 research studies on how eco-tourism affects wild animals have concluded that the trips generally benefit the tourists much more than the animals -- which may be placed at greater risk of losing their lives. (2015-10-09)

Stress is good thing for parents, babies in squirrel world
Stressed-out mothers raise stronger, heartier offspring -- at least among squirrels. In a new study, international researchers -- including University of Guelph biologists -- say squirrels tailor their parenting to meet the varied conditions facing their young. (2013-04-19)

Squirrels rise from hibernation
Ground squirrels wake up once a week from their deep hibernating sleep. American researchers found that hibernating squirrels rouse naturally to do a systems check for any parasites and pathogens and to kick-start their immune system. (2002-05-01)

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