Modern zoos balance ecological conservation and fun

Jul. 26, 2012 - Zoos have historically been museums of animals, aimed at building a collection of the most rare and exotic species. But for about the past 30 years, zoos have radically overhauled their philosophies and policies, transforming how their animals live and how they are seen by the public. (Brad Horn/The Washington Post) Correction: Clarification:

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