When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Whales and dolphins can't taste anything other than salt.
11
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14