Heart disease decimating zoo gorillas

U.S. researchers are trying to understand why so many gorillas in North American zoos are dying of heart disease.

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<p><a href="http://www.physorg.com/news124874939.html">Heart disease decimating zoo gorillas</a></p> <p>U.S. researchers are trying to understand why so many gorillas in North American zoos are dying of heart disease. </p>