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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Mars had an oxygen-rich atmosphere around 4 billion years ago
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
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Lurch, a Watusi bull, had the largest horns in the world.
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The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
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