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TIL Inflatable tanks were used during WWII as decoys.

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WkNP4 TIL Harvey Ball, the graphic designer who designed the yellow smiley face icon in 1963, was only paid $45 for his work. The Smiley Company, which licenses the image, made $419.9 million in 2017.
AN7rg TIL Sassafras the main ingredient to Sarsaparilla and Gumbo File', the roots and bark of the sassafras tree contain a high concentration of the chemical safrole. Safrole was judged a carcinogen by the Food and Drug Administration (FDA) after testing it on rats in 1960.
xVAw1 TIL the movie 'Seven Pounds' about a man (Will Smith) giving the gift of life to seven strangers, foregone the usual Hollywood premiere and instead chose Cleveland, Miami, Dallas, St. Louis, and Denver to premiere the film to raise funds for food banks in each region.
OoBgX TIL we aren't allowed to excavate the area the Graecopithecus (human's oldest direct ancestor) fossil was found because the owner of the property built a swimming pool on it.
4XW9J TIL Deinonychus, meaning "terrible claw", was the first dinosaur linked to modern birds. It had a long, talon-like claw to help disembowel prey, and it had FEATHERS!