San Diego Zoo's Institute for Conservation Research maintains a cryobank -- the Frozen Zoo -- of tissue from animals including the northern white rhinoceros, which is now extinct in the wild. Scientists at the Frozen Zoo attempt to induce stem cells from the tissue that can be used for in vitro fertilization to revive extinct species or restore genetic diversity to endangered populations. They're also developing genetic methods for identifying meat from protected species that have been killed.
Frozen Zoo uses science to try to prevent, reverse extinction
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