Rattlesnake mating sessions have been known to last more than 22 hours.
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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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Lurch, a Watusi bull, had the largest horns in the world.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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