50 years ago Cheerios were called Cheerioats.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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In 2011, a couple bought a box of textbooks for $10. Inside, they found a 25-cent bill signed by the president of the Republic of Texas, Sam Houston, and subsequently sold it for $63,250.
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There are pictures of Knights fighting Snails in old Medieval manuscripts - and nobody knows why.
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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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