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Tag: "mammals" at biology news

Large dinosaurs were extremely hot in their day, UF study finds

...sts that they operated at a rate more like today's mammals and birds. While the largest dinosaurs may not hav...ate 1960s, the notion emerged that dinosaurs, like mammals and birds, might have been warm-blooded, or endotherms, with relatively constant, high body temperat...

Researcher gives hard thoughts on soft inheritance

...expression. "Epigenetics as soft inheritance in mammals puts us on a slippery slope that many people don't want to visit," Richards says. Nutritional epigenomics Still, recent studies in mice and rats have fueled the controversy. Richards cited "a whole new world called nutritional ep...

Mice learn tasks that may help treat human psychiatric disorders

...k to another also seem to be present in most other mammals and probably also in birds. "Set shifting occurs when you've learned to pay attention to one thing and then need to concentrate on something different," he said. "For instance, I could ask you to name the suit on playing cards as I turn them over, ...

Scientists describe new African monkey genus ?first in 83 years

...ng a new genus of the best-studied group of living mammals is a sobering reminder of how much we have to learn about our planet's biodiversity," notes Link Olson, another co-author and Mammals Curator at the University of Alaska Museum. The new African monkey, Rungwecebus kipunji (rhung-way-CEE-bus key-POON...

Fertility hope as study shows eggs survive in older ovaries

...e theory, held for more than 50 years, that female mammals are born with a finite number of oocytes (eggs). Two years ago, international researchers speculated that mice could continue to produce eggs throughout puberty and adulthood. Although their speculation caused debate throughout the scientific commu...

Copying nature could save us energy, study shows

...he same way. Instead, insects, plants, birds and mammals rely on the structure and organisation of their body parts and behaviour; the solutions to problems are already built in. "An example might be a hammer," said Professor Julian Vincent from the University of Bath who led the research . "A man-made h...

Common carp sheds new light on surviving in extreme environments

... Myglobin is found in large quantities in diving mammals such as whales and seals and helps them remain submerged for long periods during deep sea dives. Similarly in humans, myglobin levels in the heart and some fatigue-resistant muscles increase when at high altitudes. New findings of myglobin levels in...

Looking to a new era in bee research

...ganism-based communities, including those studying mammals and humans. A total of 112 individuals in 63 institutions around the world signed on to analyse the newly available honey bee genome sequence, generating exciting results in many areas of biology. Themes for analysis included Anti-Xenobiotic Defe...

Bacterial protein shows promise in treating intestinal parasites

... of the study. "Crystal toxins are safe to humans, mammals and other vertebrates. And it might be possible to...owever, since the toxin can't bind to the cells of mammals or other vertebrates, Cry proteins can't hurt humans. "Crystal proteins had been used for decades ...

What animals can tell us about hemorrhage, organ transplants and aging

...lic rate, live much longer than most similar-sized mammals with a lower metabolic rate. A study of birds, bats and rodents finds differences within their cells that may help explain the longer-than-expected life span of birds and bats, Kristan said. These are just two of the symposia taking place at the ...

Sandia research to focus on early detection of harmful algal blooms

...ellfish, eventually harming or even killing marine mammals and humans that consume tainted shellfish. Sandia to focus on early-warning detection methods The Sandia research will focus on enhancing the early-warning capability of detection and is expected to lay the groundwork for the development of a r...

How does a zebrafish grow a new tail?

...cause this gene might also inhibit regeneration in mammals and man. So, if we find ways of interfering with the function of Wnt5b, we might be able to promote regeneration." Moon added that, because the same genes for turning on and turning off growth and development are found in humans, and drugs exist th...

Complexity constrains evolution of human brain genes

...idly in humans than in nonhuman primates and other mammals because of natural selection processes unique to the human lineage. The comparative pace of organ-specific evolution, however, turns out to be difficult to measure. To assess the speed with which both humans and chimpanzees accumulated many small ...

Steep oxygen decline halted first land colonization by Earth's sea creatures

...vel birds breathe 30 percent more efficiently than mammals and at 5,000 feet in elevation birds are 200 percent more efficient. Ward pictures a world in which dinosaurs were able to adapt to low atmospheric oxygen content relatively easily, and when oxygen levels rose the dinosaurs developed into giant cr...

New evidence of early horse domestication

... of the last remaining large, Ice Age, Pleistocene mammals living in one of the last places on Earth where Pleistocene vegetation survives. Because they were domesticated, the horses supplied meat year-round and vitamin-rich mare's milk from spring through fall. "No one in their right mind would try to mil...

A giant among minnows: Giant danio can keep growing

...indeterminate,?the authors wrote. “Animals such as mammals exhibit determinate growth, in which there is a fi...g that zebrafish reach a growth plateau similar to mammals and hence exhibit determinate growth. The zebrafish exhibited little hyperplastic growth after the j...

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

...rbilt researcher has discovered that some stealthy mammals have been doing something heretofore thought impos...a total surprise because the common wisdom is that mammals can't smell underwater,' said Catania, who earlier this year won a $500,000 "genius grant" from the ...

Humpback whales have brain cells also found in humans

Cetaceans, the group of marine mammals that includes whales and dolphins, have demonstrat... dolphins. The large area of cortex found in these mammals is thought to be related to acoustic capabilities and the current study shows that it is organized i...

Intrinsic eye protein halts angiogenesis

... invade the cornea. They studied a wide variety of mammals and confirmed the effect in each species including humans. "The millenia-old mystery of corneal avascularity has been the subject of serious scientific inquiry for 50 years. The significance of this publication is that we have now identified a sing...

'Killer' B cells demonstrate evolutionary link between fish and mammal immune systems

...ionary link between the immune systems of fish and mammals in the form of a primitive version of B cells, white blood cells of the immune system. Their studies link the evolution of the adaptive immune system in mammals, where B cells produce antibodies to fight infection, to the more primitive innate immun...

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