Back in 2009, the American Museum of Natural History decided to try to save genetic samples from thousands of animals currently registered as endangered. They did this by taking blood and tissue samples and freezing them using liquid nitrogen in eight different cryogenic vats. These vats have the potential to store around a million different animals genetic material.
While the purpose of this is to compare these current animals DNA to other species it isn't hard to imagine that if one of these creatures go extinct a revival might be attempted. That process could be similar to when scientists from Russia attempted to use genetic information from an extinct mammoth in order to bring one of these huge creatures back to life. Either way, this would be one of the largest mass DNA storage centers in the world today.
http://www.popsci.com/scitech/article/2009-07/nyc-museums-deep-freeze-lab-will-store-endangered-critter-dna?dom=PSC&loc=recent&lnk=1&con=nyc-museums-deep-freeze-lab-will-store-endangered-species-dna
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