The tabby crouched on the cage's platform is fiercely attentive, as if he's not sure whether he's the hunter or the hunted. Something's different about this cat: His big blue eyes are a little too close together, his nose a bit long, and his limbs on the rangy side— even for a tom. Among the dozens of friendly felines romping in a nearby corridor, this one stands out, as nervous and haughty as the last cat on Earth.
This canister, chilled to -372 degrees Fahrenheit, contains sperm and embryos, as well as samples of tissue and skin, of many different species.Photograph Courtesy of Audubon Nature Institute
