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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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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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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There's a rare breed of pig that looks like a sheep.
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Sheep, goats, octopuses, and toads have rectangular pupils.
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