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  1. 19754

    The idea of Pleistocene rewilding in North America is provocative, but it need not be treated only in the abstract. The return of beavers (Castor canadensis) to almost every region of the continent has shown us that the behavior of these creatures was, in many ways, originally responsible for the contours of the landscape and […]

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  2. Ecosystems

    Brave Old World

    If one group of conservation biologists has its way, lions, cheetahs, elephants, and other animals that went extinct in the western United States up to 13,000 years ago might be coming home.

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  3. Humans

    Letters from the November 11, 2006, issue of Science News

    The Carolinas to New Jersey “Bad-News Beauties: Poison-spined fish from Asia have invaded U.S.