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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The largest earthworm on record was found in South Africa and measured 22 feet.
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The largest breed of rabbit is the Flemish Giant.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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The male seahorse carries babies and 'gives birth' to them instead of the female.
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