The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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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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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 2005, in Africa, it was reported that three lions rescued a 12-year-old girl from kidnappers and guarded her for half a day until help came.
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