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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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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