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TIL during and immediately after the US Civil War, many -- like Frederick Douglass -- referred to it as the Slaveholders' Rebellion

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kge TIL In the 1940’s and 1950’s a “blow job” was slang for the sonic boom behind jet aircraft.
bGKN TIL a Russian mathematician solved a 100 year old math problem. He declined the Fields medal, $1 million in awards, and later retired from math because he hated the recognition the math community gives to people who prove things
RJ17 TIL a 93-YEAR-OLD Japanese man has been officially recognised as the only person to have survived two nuclear bombs.
woPO1 TIL that squids and octopuses don't have blind spots
5YLJk TIL Space Shuttle Challenger on the mission STS-61-A in 1985 carried 8 people into space from launch to landing, making it the record for the largest crew flown on a single mission