The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4