Dire wolves actually existed, living up to 10,000 years ago before going extinct.
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The reindeer is the only mammal that can see UV light.
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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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The two oldest cats on record lived to 38 and 34 years old, both were owned by the same owner and lived off a diet of bacon, eggs, broccoli and coffee.
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There are approximately three chickens for every human on Earth.
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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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