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David Keller

(A dinosaur model at the Academy of Natural Sciences, on Logan Circle, gets a birthday hat in honor of the institution's 200th anniversary.  Credit: John McDevitt)

Philadelphia’s Academy of Natural Sciences Marks Its 200th Birthday

A new bicentennial exhibition is opening to the public this weekend at the Academy of Natural Sciences, on the Benjamin Franklin Parkway at Logan Circle.

03/22/2012

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