Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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Only 3% of bird species have penises.
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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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Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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