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TIL when coughing, people can expel saliva at speeds faster than a train (800 km/h). Solid objects at this speed could even break a rib.

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JpwV TIL that the chef’s hat (or toque) has 100 folds in it to represent the number of different ways the chef can cook an egg
VMyJp TIL Billy Joel never sells front row tickets at his concerts
WkEE8 TIL of the Bethke brothers. Each escaped from Soviet East Berlin. Ingo floated on a mattress across a river. Holger used a bow to fire a cable across the gap, then zip-lined to safety. Then Ingo and Holger built an aircraft and flew back over the wall to rescue their third brother, Egbert.
emnn TIL The Concorde supersonic jet stretched during flight due to the heat it generated. On its final flight the crew placed their hats into a crevice in the floor which appeared during the flight, as the aircraft cooled the crevice closed, permanently sealing their hats in the aluminum airframe.
v1Z6r TIL that Haiti had to financially recompensate France for lost colonial profits after gaining independence through its successful slave rebellion. This independence debt wasn't paid back in full until 1947.