Inside the Columbus Zoo and Aquarium's Groundbreaking Work in Conservation

From drawing blood from a giraffe to raising a cheetah with Labradors, the zoo that stars in National Geographic's hit show "Secrets of the Zoo" takes "Nightline" behind the scenes.

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About ABC Nightline

Nightline, television's most esteemed late-night news program provides viewers with in-depth reporting on the major stories in the news. See More

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