Jellyfish as a species are actually older than dinosaurs and sharks.
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A scorpion can hold its breath for up to 6 days.
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When cats are happy, they may squeeze their eyes shut.
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The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
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In order to enhance the taste, Japanese macaque wash their food in salt water before they eat. They also make snowballs for fun!
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