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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When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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There are approximately three chickens for every human on Earth.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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Sharks, like other fish, have their reproductive organs in their chests.
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