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TIL Dead Skin Cells are a Main Ingredient In Household Dust

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Y7ZPB TIL that the U.S. Army created four fake armies and over 20 fake divisions, including insignia and documents, to mislead and confuse the Germans during WWII
VBOQ4 TIL that John Rock, one of the creators of the contraceptive pill, was a devout Catholic
ep7bE TIL the U.S. Department of Defense spent $41.6 million on Viagra and $84.24 million total on drugs for erectile dysfunction in 2014. Less than 10% of prescriptions were for troops, the rest went to retirees or family members covered by military health plans.
OG6J6 TIL Humphrey Bogart was an avid chess player and often played correspondence chess with soldiers overseas during World War II. In 1943, the FBI told him to stop doing so after they intercepted his mail believing the chess notations to be secret codes.
DloV TIL of Lake Disappointment, Western Australia. So named because the explorer who discovered it followed creeks inland expecting to find a large lake, only to be disappointed when it turned out to be a large salt flat.