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TIL that a United States' bombing campaign on North Korea from 1950 to 1953 destroyed approximately 85% of its buildings and killed 15-20% if the entire population

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e0Vkn TIL: A submarine ran out of fuel about 100 miles from hawaii while searching for a lost tug. Sub R14 had empty reserve tanks, no radio communications and a week's worth of food. Crew rigged up blankets and mattress covers as sails. It sailed back to Hawaii over 5 days.
P1NVL TIL The Solar System is surrounded by colossal spherical shell of trillions of icy objects called the Oort Cloud
nm5G TIL: The original TRON arcade game made more money than the film’s initial release.
ePOL TIL General Motors used live animals as crash test dummies up until 1993 and once received a letter “so mean it ended up in the hands of the FBI”.
VMEL0 TIL At 40, women's chance of conceiving a child with Down syndrome is one in 100; at 45 it's one in 30.