The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Parrot parents "name" their children with a signature call.
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