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TIL that a cyanometer is an instrument used to measure the intensity of blue in the sky

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grv9 TIL Coca-cola thinks “no consumer could reasonably be misled into thinking Vitaminwater was a healthy beverage”
6EMMX TIL Banach-Tarski Paradox: if you accept as true the Axiom of choice (i.e. from non-empty set you can always pick up a random element) then you could decompose a golden sphere into a finite number of pieces and, without any strecthing, reassemble these into two balls identical to the original one.
loLGK TIL Waist chop or waist cutting was a form of execution used in ancient China. As its name implies, it involved the condemned being sliced in two at the waist by an executioner
JYWev TIL of the four original members of The Killers, only three still write and compose new music, and only two still actively tour. (However, all four remain official members of the band.)
NXp9N TIL that if you laid out an adult's circulatory system, the blood vessels would total over 60,000 miles. That equals more than twice around the world.