Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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When dragonflies mate, their tails form a love heart.
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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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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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In 1949, an official boxing match between a bear and a man was held. The bear won.
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