Frozen semen, guinea pig tumors and spare organs help zoo save and preserve lives

The St. Louis Zoo’s frozen zoo is like a bank, an important depository of tools that researchers can use to help animals now and in the future. It’s housed in the Endangered Species Research Center and Veterinary Hospital, Home of the AZA Reproductive Center, behind River’s Edge and within sight of the cheetah exhibit. It’s only open to the public for special tours.

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