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 breed of rabbit is the Flemish Giant.
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Bats sleep 18-20 hours per day.
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In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
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Sloths take two weeks to digest their food.
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Ants have tiny magnetic compasses in their antennae which help them navigate.
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Squirrels forget where they hide about half of their nuts.
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