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.
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The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
When dragonflies mate, their tails form a love heart.
22
A giraffe's kick is so powerful that it can decapitate a lion.
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