Most scientists agree modern humans developed in Africa, more than 200,000 years ago, and that a great human diaspora across much of the rest of the world occurred between perhaps 60,000 and 50,000 years ago.
Evolution
May 24, 2023
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510
A new study challenges the orthodoxy of microbiology that in response to environmental changes, bacterial genes will boost production of needed proteins and decrease production of those that aren't. Researchers with the U.S. ...
Cell & Microbiology
Jun 19, 2013
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The passenger pigeon is famous for the enormity of its historical population in North America (estimated at 3 to 5 billion) and for its rapid extinction in the face of mass slaughter by humans. Yet it remains a mystery why ...
Plants & Animals
Nov 16, 2017
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A newly published collection of more than 20 studies by leading university scientists and government fishery researchers in Alaska, British Columbia, Washington, Oregon, California, Russia and Japan provides mounting evidence ...
Ecology
May 14, 2012
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(Phys.org) —A Cornell study offers further proof that the divergence of humans from chimpanzees some 4 million to 6 million years ago was profoundly influenced by mutations to DNA sequences that play roles in turning genes ...
Biotechnology
Jun 12, 2013
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The Sherpa population in Tibet is world-renowned for their extraordinary high-altitude fitness, as most famously demonstrated by Tenzing Norgay's ability to conquer Mount Everest alongside Sir Edmund Hillary. The genetic ...
Biotechnology
Sep 17, 2013
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(Phys.org) -- Because the gradual increase in temperatures worldwide is still relatively new, researchers have had difficulty in finding examples of genetic changes in organisms that are adapting to the warmer temperatures. ...
Cavefish are seemingly insignificant: They are small, they live in tucked away places humans rarely go, and they're quite common, found on every continent except Antarctica. But researchers from the Stowers Institute for ...
Plants & Animals
Jul 20, 2020
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391
(PhysOrg.com) -- Biologists have long known how adaptive evolution works. New mutations arise within a population and those that confer some benefits to the organism increase in frequency and eventually become fixed in the ...
Evolution
Aug 10, 2009
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A current controversy raging in evolutionary biology is whether adaptation to new environments is the result of many genes, each of relatively small effect, or just a few genes of large effect. A new study published in Molecular ...
Evolution
Apr 3, 2012
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