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TIL that a 1992 study of 100 different sites in 22 states showed that when the speed limit was raised the number of accidents decreased by 6.7%. When the speed limits were lowered the number of accidents increased by 5.4%.

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wLNMo TIL the James Webb Space Telescope has gold-plating on its mirrors because the mirrors are made of poorly-reflective beryllium able to withstand cold.
KvrG TIL a man tied 45 weather balloons to a lawn chair and packed a gun to shoot himself down. Instead of raising the planned 100 feet he shot up 16,000
8aplP TIL When Robin Williams auditioned for the role of Mork on 'Mork and Mindy', he was asked to take a seat. Williams responded by sitting on his head, upside down in the chair. He was hired on the spot because, 'He was the only alien to audition' for the part.
mR0Y TIL the highest casualty rate ever suffered by the US Army (97.6%) came at the hands of indigenous forces at the Battle of the Wabash. The battle wiped out one-quarter of the entire US Army and led to the first-ever congressional investigation of the executive branch.
GYnPJ TIL that there is a Peruvian Christmas Tradition where people fight each other to settle grievances on Christmas Day.