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TIL John Lennon hated the Beatles song Ob-La-Di, Ob-La-Da calling it more of Paul's 'granny music shit'. When George Martin offered McCartney, a perfectionist, vocal tips, McCartney responded, "Well you come down and sing it," causing Martin to get really upset. The recording engineer quit next day.

1ago7 TIL Stethoscope was invented when a 'gentleman' French doctor got too embarrassed to check the heartbeat of a female patient by tapping at her chest. So, he rolled up a sheet of paper to create a tube, and then placed it on her chest. The method worked, and stethoscope was invented.
nWya9 TIL: That the Beirut Explosion of August 4th, 2020 is considered one of the most powerful artificial non-nuclear explosions in history. It was equivalent to around 1.1 kilotons of TNT and generated an earthquake equivalent to 3.3 in magnitude.
aworM TIL about the Battle of Jumonville Glen, in which a young George Washington ambushed a French Canadian outpost. This became the opening battle of the French and Indian War.
9w0JG TIL Kasane Teto, a virtual singer software created on the Japanese textboard 2channel for April Fools' Day, 2008. Initially conceived as a hoax by users who planned to make a fake Vocaloid character, it was eventually developed into a real product. She was introduced as a "diva born from a hoax".
4XdvR TIL the reason a bag of potato chips contains mostly air is not to deceive the consumer into believing there is more product. Instead, the air (called slack fill) provides cushioning that protects the chips. "Less air, more chips but they are shattered or More air, fewer chips but they are whole"