Early American humans hunted car-size armadillos and used their shells for houses.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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A dork is a whale's penis.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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Parrot parents "name" their children with a signature call.
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