The exact cause of death and burial site of Genghis Khan is unknown, because all of the 2000 funeral guests and 800 soldiers were killed in order to preserve the secret.
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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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There are 92 known cases of nuclear bombs lost at sea.
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Because metal was scarce; the Oscars given out during World War II were made of plaster.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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In 1982, a high school student from Los Angeles, California unscrambled the Rubik's Cube in 22.95 seconds.
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A baboon called Jackie became a private in the South African army in World War I.
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