There are pictures of Knights fighting Snails in old Medieval manuscripts - and nobody knows why.
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Shakespeare invented over 1,700 words that we use today.
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It has been calculated that every 2 minutes, we take more pictures than all of humanity in the 19th century.
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A man named Heraclitus had an illness that made his body swell up with water. To try to sweat it off, he buried himself in a steaming pile of animal poo, but then overheated and died of dehydration.
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Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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