Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
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There are pictures of Knights fighting Snails in old Medieval manuscripts - and nobody knows why.
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In 1956, the IBM 350 hard disk drive had 3.75 MB of storage, weighed over 2000 lbs, had to be moved around with forklifts, and was delivered via large cargo airplanes.
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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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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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20 years ago, there were only 130 websites, Google wasn't around, and you had to pay for an email account through an ISP.
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In real life, Pocahontas was 11 years old when she met John Smith - he was 28.
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