There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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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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The cat brain weighs about 30g.
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The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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A group of kittens is called a "kindle".
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