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TIL barns are painted red because red paint is cheap. The paint is cheap because iron is plentiful, and iron is plentiful because it is the final element formed out of a star’s death.

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yQbWp TIL Shavarsh Karapetyan is a retired Armenian swimmer. In 1976, after completing his daily 20-km run, he came upon an accident scene where a trollybus had fallen into a reservoir. Karapetyan dived 10 meters into the water and pulled 46 people out of the bus, 20 of whom survived.
nvV7 TIL in 2011 a Russian man who attempted to rob a beauty salon was beaten into submission by the female owner, who is a black belt in karate, and kept as a sex slave for three days.
J1vN1 TIL the fictional languages in the Game of Thrones series are fully complete languages. Of all the actors that had to speak one or more of them, the person that portrayed the Grey Worm character was considered the best/most talented. He was skilled enough to speak like a natural native speaker.
Aomd TIL that after the launch of STS-70, NASA had installed plastic owls on and around the space shuttle to prevent woodpeckers from boring holes in the insulation of the external fuel tank.
VMmZG Today I learned that humans have 3 cones that mix and blend to make all the colors that we can see. It turns out there is a special type of shrimp that has 16 cones. This means there are millions if not billions of colors that we can't even imagine let alone see.