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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One in three dog owners say they have talked to their pets on the phone.
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There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
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The elephant brain weighs about 6,000g.
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The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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