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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The World Trade Center towers used to have two zip codes, 10047-10048, one for each building.
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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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Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
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In 1963, the US Military created an artificial ring around Earth, similar to that of the planet Saturn. The ring was made of copper needles and was used for worldwide communications in the case that the Soviets disabled all other methods of communication.
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The ancient Egyptians bought jewelry for their pet crocodiles.
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