The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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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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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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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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