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TIL: Gerald Barnbaum posed as a doctor for over 20 years. He killed at least one patient due to not being a real doctor and impersonated different doctors in multiple medical facilities in San Francisco earning $400k by 1991. He even got a position where he did checkups on FBI agents.

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WkOQd TIL of the Cokeville Elementary School Hostage Crisis. Where David Young stormed into a school with his wife, armed a bomb, and held 70+ students hostage. After 2 hours the bomb went off, but due to a series of coincidences, all hostages survived. Children later reported seeing angels.
78lJZ TIL Implosive Joining creates a permanent, high-quality connection via an implosive that presses together cables.
DR0D TIL 60 tons of mammoth tusks is excavated every year and marketed as an ethical source of ivory. It sells for ~$350/kg
yQAkw TIL that Stephanie Kwolek invented Kevlar and is the only woman to win DuPont company's Lavoisier Medal for outstanding technical achievement
KYrWE TIL For the Movie Angels with Dirty Faces (1938), James Cagney's main inspiration for playing the role of Rocky was a drug-addicted pimp, who stood on a street corner all day hitching his trousers, twitching his neck, and repeating: "Whadda ya hear! Whadda ya say!"