Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
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There are pictures of Knights fighting Snails in old Medieval manuscripts - and nobody knows why.
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A Kodak engineer constructed the first digital camera in 1975. They didn't want to go digital. They went bankrupt in 2012.
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Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
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The ‘@’ sign is centuries old, and was used in Europe to denote a unit of weight (the “arroba”) equivalent to 25 lbs.
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Romans used a plant called Silphium as contraception. They had so much sex that they drove it into extinction.
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