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TIL, that mathematician, George Dantzig solved a simplex linear problem, that was thought to be impossible to solve, by accident, because he arrived late to class, and thought the problem on the board was a homework assignment.

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L7dQ TIL during mating season, male Dawson’s bees try to bite each other to death in a frenzy, resulting in “whole generations of male bees wiping each other out” & in 1 male emerging to mate with the female. Dawson’s bees communities are harmonious for most of the year because all the males are dead.
MeM80 TIL Norwegian police banned a team of Finnish divers from a cave in 2014 after 2 people died. In secret, the divers pulled their 2 dead friends to the surface & fulfilled a promise to a widow of one man. The illegal rescue took 27 divers & 101 hrs in frigid water, using about 1-ton of equip.
QJYvd TIL about Frank Eaton, aka Pistol Pete, who began training to avenge his father at the age of 8. His father's friend handed him a gun stating, "My boy, may an old man’s curse rest upon you, if you do not try to avenge your father.” He succeeded in his revenge.
1aVx8 TIL that Frane Selak, the world's luckiest unluckiest man, cheated death seven times, including surviving a free fall from a plane by landing in a haystack, and then went on to win the lottery for $1 Million.
nplo TIL Ripley’s Believe It or Not was researched by a man who spent ten hours a day, six days a week in the New York Public Library for 52 years, researching more than 350,000 books during his decades of work for Believe it or Not.