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TIL the farthest a person has ever fallen and survived is at least 33,330 feet. Serbian flight attendant Vesna Vulovic was blown out of a plane when a bomb went off in its baggage compartment in 1972. She had no memory of the event and wasn't afraid to fly afterward.

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XKmX TIL of the Chrysler Air-raid Siren. It was powered by a 331CI Hemi engine that made 180HP. It’s six horns were 3ft long, had an output of 138dB, and could be heard up to 25 miles away. It produced the loudest sound ever achieved by an air raid siren.
XEank TIL moviegoers seeing "13 Ghosts" in 1960 could choose if they wanted to see the ghosts or not. The ghosts were added with a red filter on scenes with a blue filter. People were given viewers with red and blue cellophane, and depending on which one they looked through could "remove" the ghosts.
OoZQY TIL about Stefan Lanka's Measles lawsuit. Lanka claimed that measles did not actually exist and was in the mind. He offered €100,000 to anyone who could prove the disease existed. After he rejected medical papers, David Bardens, a German doctor, took him to court. Lanka lost and was ordered to pay.
MYvm TIL that concrete is sometimes imbued with special bacteria, allowing itself to self-heal and strengthen through calcification.
0dejN TIL In June 2022 Belgium returned the gold-capped tooth of Patrice Lumumba. Lumumba had been executed in 1961 and the tooth was all that remained after the first Prime Minister of the Republic of the Congo was dissolved in acid and his bones ground to dust.