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TIL that Genghis Khan slaughtered the inhabitants of an entire city because they killed his son-in-law. Khans grieving daughter requested that all citizens be decapitated to ensure they were dead and that pyramids be built from their skulls

Read more history.howstuffworks.com

via reddit.com

E1087 TIL that the American flag deployed on the moon during the Apollo 11 mission was inserted only seven inches deep and was placed about 27 feet from the Eagle landing craft. As a result, it was blown over by the blast of the rocket exhaust during the takeoff back to Earth.
R7agj Today I learned of the continuously ringing bells at Oxford University that have been going since 1840 with batteries no one wants to open to see the contents of until the bell finally ceases to ring.
VRQk TIL that in 1970, the State of Connecticut denied a gay man a driver’s license on the basis that his sexuality made him dangerous to other drivers
g0yX TIL that there are over 100 million people in the world today who have Irish ancestry, which is more than fifteen times the population of 6.4 million on the entire island of Ireland.
0dGPL TIL that Vanguard 1, an early US satellite, was the first practical use for solar panels. Leading us to all the solar power we utilize today.