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TIL that ulugh beg, the sultan of the timurid empire and grandson of the turco-Mongol conqueror Timur, was an astronomer and mathematician who composed zij-i-sultani of 994 stars, generally considered one of the greatest star catalogues between Ptolemy and Tycho Brahe.

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vL48 TIL that height has a more important effect on earnings than gender.
oZPE TIL in 1967, protesters requested a permit to levitate the Pentagon 300 feet in the air, through songs and chants, to exorcise it of its evil and end the Vietnam War. Authorities agreed to only 3 feet.
vmD4 TIL that in WWII Charles Lindbergh instructed P-38 pilots how to stretch their typical 7 hour maximum flight endurance time to 9 hours (an extra 400 miles of range), which dramatically changed Pacific Theater operations
Br8dx TIL Yahoo! paid Mark Cuban $5.7billion for Broadcast.com - a service that has since been discontinued.
9Yg0m TIL before the United States had an established name there was an early movement to call the country "Fredonia" after the word Freedom. Citizens would be called Fredes or Fredish. The name lost ground after it became a common form of mocking political opponents.