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TIL of the “Squeeze”, which was a type of accident in the early days of diving causing a catastrophic loss of pressure in the diving suit of the diver. The immense pressure would suck the skin and organs up into the heavy copper diving helmet, leaving the bones and straps of flesh in the diving suit

E1mjw TIL that in WW2, US used Native Americans for message encryption. They were called "code talkers" as they simply talked in their native language for transmitting the messages. This allowed fast communication over open channels as enemy was unable to break this code. Was crucial in winning the war.
p80RA TIL that the inventor of the karaoke machine, Daisuke Inoue, never patented his invention because he “didn’t think anything would come of it.” 33 years later he was awarded the Ig Nobel prize for his work.
W7Y08 TIL Will Smith was originally desired to be cast as Neo in the Matrix. He turned down the role to play Jim West in the film Wild Wild West.
wow4W TIL in the early 1990s Amsterdam airport came up with an ingenious design “to etch an image of a black house fly” to reduce spillage in men’s wall mounted urinals. The result: spillage was 80% reduced. Lesson learnt- If you give men a target, it turns out, they can’t help but aim at it.
R7D1j TIL that wheelchair athletes with spinal injuries would intentionally injure the lower part of their body to increase their blood pressure which would enhance their performance. This practice is called ‘Boosting’ and has been banned by the International Paralympic Committee since 1994.