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TIL the color used for cigarette packaging in Australia is called "Pantone 448 C", it was chosen after researchers determined that it is the "world's least attractive color."

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VxVG TIL about the Old Man, a 30 foot tree stump that has been floating around vertically on Crater Lake for 130 years and scientists aren’t really sure why.
9nbm TIL The Horseshoe Crab, which has been around for 450 million years, bleeds blue blood because it has Hemocyanin, which has copper, instead of hemoglobin as a transport protein.
vY5x TIL The tallest building in the world to have a woman as lead architect is in Chicago (Aqua Tower)
ne867 TIL that in 1940 Disney's movie "Fantasia" invented the concept of stereo sound, eventually changing the music industry forever. To promote the film, Disney created a surround sound system called "Fantasound" that used multiple speakers spread across a room to immerse audiences in the film's music
VBBJ0 TIL about greek mythological figure Biston, son of Ares. He is considered to have introduced the Thracian practice of tattooing both men and women with eye-like symbols as a magical fetish which was said to be ensuring victory against their neighbouring tribes according to the oracle.