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TIL an on-board fire that caused the crash of an Imperial Airways flight in 1933 is suspected to be the first instance of airliner sabotage.

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ne8Ro TIL that in traditional Chinese medicine, a tiger penis is said to have important therapeutic properties. The penis of a tiger when consumed is said to be a potent aphrodisiac and an effective treatment for erectile dysfunction. However, there is no scientific evidence to support this.
16pZP TIL why all clocks go clockwise. In Medieval times, the sun-dials used as clocks in Northern Hemisphere used to trace clockwise. Early timepieces were made to mimic this motion. This, however, became such a norm that we started describing rotational motion in 2D as "clock"wise and counter"clock"wise
D1Xrr TIL that Rudyard Kipling's The Jungle Book was written for St. Nicholas Magazine, a publication for children edited by Mary Mapes Dodge. Dodge, author of Hans Brinker, or the Silver Skates, asked Kipling to contribute something and although he'd never written for children before, he said he'd try.
rvv4 TIL that velociraptors are actually much smaller than they appear in Jurassic Park; they are modeled after a related species. However, shortly after production of the movie, a raptor species (Utahraptor) was discovered that was extremely similar to the movie raptors.
GYaej TIL: Queen's university's Medical School banned black medical students in 1918 and did not consider black applicants until 1965. The ban, however, was not officially removed until 2018.