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Dec 2019
28m 14s

The Frozen Zoo

NATIONAL GEOGRAPHIC
About this episode
Right now, one million animal and plant species are threatened with extinction. Conservation scientists are doing whatever they can to save them, or at least of piece of them. For the last 45 years, a team of researchers at the San Diego Zoo has been freezing the cells of endangered animals. With these time capsules of DNA, researchers continue to study enda ... Show More
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