Mars had an oxygen-rich atmosphere around 4 billion 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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The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
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If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
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Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
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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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