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Latest Beth Shapiro Stories

DNA Study Reveals Secrets Of Gentically Similar Polar And Brown Bears
2013-03-15 10:22:25

Brett Smith for redOrbit.com - Your Universe Online A new report in PLoS Genetics attempts to clarify conflicting studies on a population of Alaskan brown bears that are genetically similar to polar bears, yet look and act like typical brown bears. "This population of brown bears stood out as being really weird genetically, and there's been a long controversy about their relationship to polar bears," said co-author Beth Shapiro, a professor of ecology and evolutionary biology at the...

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2011-07-08 07:40:00

A team of international scientists has found that all living polar bears descend from a single mama brown bear that lived 20,000 to 50,000 years ago in modern-day Ireland.The scientists from Britain, Ireland and the U.S. analyzed DNA samples from polar bears in Alaska, Canada, Greenland, Norway and Russia, and compared them to DNA obtained from teeth and skeletons of 17 ancient brown bears that were found at eight cave sites across Ireland. The results revealed that every individual Polar...

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2010-03-08 15:35:39

A team of scientists has discovered that the drastic decline in Arctic musk ox populations that began roughly 12,000 years ago was due to a warming climate rather than to human hunting.  "This is the first study to use ancient musk ox DNA collected from across the animal's former geographic range to test for human impacts on musk ox populations," said Beth Shapiro, the Shaffer Career Development assistant professor of biology at Penn State University and one of the team's leaders. ...


Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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