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TIL that the discovery of radium ignited a health fad in the early 1900s that saw it being used as a medical cure-all, in lipsticks, chocolates, toothpaste, water, health spas, treatment of impotence and chicken-feed!

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wDk6 TIL yawning is not contagious for children with autism due to their inattention to facial cues.
1DVr TIL around 20 million chinese civilians died in World War II.
BjML TIL there is a Cyrillic letter so rare it is only used in the phrase “many-eyed Seraphim”
9wy8m TIL Harry Truman tried to buy Greenland in 1946
5exR TIL in Michael Crichton’s novel “Jurassic Park,” John Hammond states that the pre-recorded park tour is narrated by Richard Kiley, who later played the same role in the film, marking perhaps the first time that a celebrity named as a book character was later cast as him/herself in a film adaptation.