Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
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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 have names for one another.
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When cats are happy, they may squeeze their eyes shut.
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Cats recognise the voice of their owner, but never evolved to care.
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Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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