In 1949, an official boxing match between a bear and a man was held. The bear won.
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Dolphins have names for one another.
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Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
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If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
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When cats are happy, they may squeeze their eyes shut.
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The Basenji dog is the only dog that is not able to bark.
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