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TIL Genghis Khan killed about 10% of the world population.

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OWN1 TIL that “Make feet for children’s stockings” was once a euphamism for sex.
kJJ8d TIL that Xanadu is an alternative name for Shangdu, the summer capital of Kublai khan and the yuan dynasty in general. The name Xanadu itself and its meaning as a metaphor for a place of opulence was popularized by Samuel Taylor Coleridge in his poem about Kublai khan.
OPjL TIL When the government wanted to cut Public Television funds in 1969, the relatively unknown Mister Rogers went to Washington. While the budget should have been cut, the funding instead jumped from $9 to $22 million.
xQrD TIL George Washington’s best spy, code named ‘Culper Jr.’, was only identified as Robert Townsend nearly 150 years after the war because a Long Island historian named Morton Pennypacker recognized his handwriting from some business receipts and matched it to intelligence correspondence.
QJgB6 TIL that due to the effect that gravity has on time, the core of the earth is approximately 2.5 years younger than the surface