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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Bats sleep 18-20 hours per day.
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A cow produces around 200,000 glasses of milk in her lifetime.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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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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Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
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