Early American humans hunted car-size armadillos and used their shells for houses.
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A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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Cats sleep for 70% of their lives.
8
The oldest creature ever found was Ming the clam at an admirable 507 years old.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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