When the woods get crowded, female squirrels improve their offspring's odds of survival by ramping up how fast their offspring grow.
Plants & Animals
Apr 18, 2013
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(Phys.org)—Conventional wisdom holds that genes determine the shape and structure (morphology) of animals, but something else may be at play. A new study shows that a roundworm (P. pacificus) regulates its offspring's morphology ...
Cell & Microbiology
Jan 4, 2013
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A series of rapid environmental changes in East Africa roughly 2 million years ago may be responsible for driving human evolution, according to researchers at Penn State and Rutgers University.
Earth Sciences
Dec 24, 2012
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A family of nutrient-sensing enzymes, dubbed Rag GTPases, modulates the activity of the mTORC1 protein complex, whose inhibition is essential for autophagy and survival in newborn mammals. One enzyme, RagA, has been found ...
Cell & Microbiology
Dec 23, 2012
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When seasonal changes affect food availability, omnivores like blue monkeys adapt by changing their diets, but such nutritional changes may impact female reproduction, according to research published November 28 in the open ...
Plants & Animals
Nov 28, 2012
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In the bird world, they make endangered condors seem almost commonplace. The unique Great Gray Owls of Yosemite, left to evolve after glacial ice separated them from their plentiful Canadian brethren 30 millennia ago, are ...
Plants & Animals
Oct 22, 2012
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Thanks to studies of a fish that gives birth to live young and is not fished commercially, scientists at UC Santa Barbara have discovered that food availability is a critical limiting factor in the health of fish populations.
Ecology
Sep 27, 2012
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Arctic reindeer have no problems with snowstorms but are badly affected by rain, a finding that has implications for assessing how climate change affects wildlife, a study on Wednesday says.
Ecology
Sep 26, 2012
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(Phys.org)—Research indicates the out-of-Africa spread of humans was dictated by the appearance of favourable climatic windows.
Archaeology
Sep 17, 2012
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Tanzania is one developing country that could actually benefit from climate change by increasing exports of corn to the U.S. and other nations, according to a study by researchers at Stanford University, the World Bank and ...
Economics & Business
Jul 27, 2012
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