George Schaller, Biologist and Conservationist

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At 75, American biologist George Schaller has spent his life studying wild animals in more than 25 countries: mountain gorillas, snow leopards, alligators and caribou. It was he who inspired the primatologists Jane Goodall and Dian Fossey, for example. Schaller is the recipient this year of the $100,000 Indianapolis Prize, the world's top award for animal conservation. In another of our weekly series, Carolyn Weaver reports on a man who has long been making a difference.