Researchers have found they can get a good idea of a grizzly bear's diet over several months by looking at a single hair. The technique, which measures residues of trace metals, can be a major tool in determining if the threatened animals are getting enough of the right foods to eat.
http://www.sciencedaily.com/releases/2015/07/150728101209.htm
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Re: Single hair shows researchers what a bear has been eating
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