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TIL the famous Hollywood sign was in a state of disrepair and ultimately torn down for three months in 1978. Playboy’s Hugh Hefner helped rebuild it via a $250K fundraising campaign. He then donated $900K to save it again in 2010.

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Vl4p TIL that Brazil tops the list of countries which export guns to the US. In 2010, the US imported more than half a million handguns from Brazil.
oBbY8 TIL about potash evaporation ponds in the Utah desert. Depending on the amount of potash inside the pools, they can turn turquoise, orange, yellow and even white. About 700 - 1000 tons of potash are produced very day, which can then be used to fertilize plants and treat industrial water.
9wJeB TIL in 2023, Heinz created a Label of Truth that shows the exact Pantone reference color of Heinz ketchup. This is so that consumers can trust that they are being served the right product. The scale measuring the color of ketchup ranges from "Heinz" to "Not Heinz" and "Is That Even Ketchup?"
wL8VP TIL Hawaii's public education system began in 1841 and is the oldest in the U.S. west of the Mississippi. When the kingdom was overthrown it became illegal to teach the Hawaiian language, teachers were punished for speaking Hawaiian at school. It wasn't until 1978 that the state made it mandatory.
8eaYa TIL that Goodyear created colored, light-up tires in the 1960s. However, it never made it into mass-production, one reason being that other drivers drove too dangerously whilst trying to look at the tires.