In the 1940s at the Bronx Zoo’s Children Zoo, guinea pigs experienced the life of medieval royalty. The guinea pigs had their very own castle, complete with a moat and drawbridge.

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Happy World Lion Day! WCS conservationist George Schaller took this photo of lions taking a break in the shade of a tree during his pioneering studies of lion behavior and ecology in the Serengeti in the 1960s. 

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