Only 3% of bird species have penises.
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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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The reindeer is the only mammal that can see UV light.
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By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
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Alligators can live up to 100 years.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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