The first semi-permanent settlements appeared in Florida around 5000 B.C.
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The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
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During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
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Tickling was a form of torture used in ancient China on nobility because it left no mark and recovery was quick.
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Nazi leader Adolf Hitler had only one testicle.
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Napoleon constructed his battle plans in a sandbox.
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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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Approximately 40% of the U.S. paper currency in circulation was counterfeit by the end of the Civil War.
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