› added 1 year ago

54

TIL that rapidly unwinding a roll of Scotch tape can generate x-rays due to the triboelectric effect

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PP7e TIL The US Marines found a stockpile of Taliban weapons in 2010 that contained a 1915 Lee-Enfield Bolt Action rifle still being used.
EgQBP TIL: That people who experience discomfort watching cringe have higher levels of empathy.
ep7b6 TIL the tradition of sending holiday cards started because Henry Cole wanted “a convenient way for him to speak to his many friends and associates without having to draft long, personalized responses to each.”
ADeDn TIL. Only 8% of the world's currency exists as physical cash. The rest exists only on a computer hard drive in electronic bank accounts around the world.
VM7V4 TIL that some of the coughing sound effects from General Grievous in Star Wars: Episode III – Revenge of the Sith were actually recordings of George Lucas while he had bronchitis.