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TIL of Lake McDonald where the water is clear and the bed is covered with multi - colored pebbles made of clay containing iron. (pics and article)

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NX7NN TIL about Operation ABSCAM, which was a FBI sting operation carried out in 1980 to trap corrupt politicians. Which included a senator and six congressmen
nem6r TIL Juicy Fruit Gum, Pabst Blue Ribbon, Cream of Wheat, the moving walkway, and the movie theater were all introduced at the 1893 World's Columbian Exposition in Chicago, among other inventions
Y7ROZ TIL The Photos in the Cheers Opening montage were taken at a bar in Craigville, Minnesota in 1937
XENEr TIL the blue liquid at the bottom of a porta potty was originally made with formaldehyde in order to deal with the smell. Nowadays more and more manufacturers are using enzymes and microbes that feed on odor-causing bacteria.
gMbn7 TIL that last year astronauts found a rock from Earth on the Moon which is believed to be 4 billion years old.