In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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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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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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