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TIL A 2500-year-old Chinese book called Sun Tzu's The Art of War is required reading for all US Marine Corps officers

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E1QJo TIL That in the Live Aid Queen performance, at 16:38 you can see a wave going to the back of the stadium from the people clapping. That wave is the speed of sound, caused by the people at the back hearing the music a split second before the people at the front.
VMZyQ TIL that armadillo shells can deflect bullets
PY9XZ TIL Grand Theft Auto V cost $265 million to make -- the largest budget of any video game at that time -- but turned around and made $1 billion in its first 72 hours
l7Xda TIL that in 1982, the U.S. State of Oregon sued the organiser of a backgammon tournament, arguing that the game was illegal gambling. The judge ruled against the state, saying that backgammon is a game of skill.
xVm77 TIL Neither the mafia nor other criminal organizations have used cemented shoes to drown their victims. This method has only been used in single cases to submerge (already) dead bodies