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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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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The reindeer is the only mammal that can see UV light.
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A group of unicorns is called a blessing.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
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There's a lizard known as the 'Jesus Lizard' that can run across water.
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