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TIL that in 2015, the State of New York conducted DNA tests on popular supplements and found that in 4 out of 5 cases the pills contained nothing more than filler

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via reddit.com

nW4GP TIL that John W. Campbell Jr.'s mother had a twin sister, which disturbed him as a child as he couldn't tell them apart and inspired him to write "Who Goes There?", the novella "The Thing" was adapted from.
8aMPX TIL the woman in the famous "Migrant Mother" photo was Florence Owens Thompson, a Cherokee woman and widow who came from Oklahoma to California with her second husband during the Great Depression. Her 10 children all survived poverty and starvation and later bought her a house. She lived to be 80.
N7kNM TIL about the existence of Monkey Tail Beards and that there is a world record for largest gathering of people with them on their faces.
E1ga7 TIL that the first emperor of China died from drinking a mixture of mercury and powdered jade intended to give him eternal life.
7rxwL TIL about lorentz transformations are very easy to visualize.