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TIL in 1997, the United States Library of Congress recognized the song Truckin' by the rock band Grateful Dead as a national treasure of the United States.

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BrWEk TIL 'US Radium' employed women to paint dials of watches with radioactive radium paint. The women were instructed to point their brushes on their lips. This led to many of the workers' losing their jaws and even deaths. Company paid examiners covered it up and claimed they had syphilis.
pJgb TIL Rubbing alcohol burns when applied to wounds because it increases the sensativity of VR1 nerves (the nerves that tell your brain if something is hot) and your own body heat becomes the burning sensation.
OGlY1 TIL Americans pronounce the word “interesting” with four syllables, unlike the three in my country
kO8we TIL in the 1990s, the Galapagos Conservancy launched Project Isabela, an all out war against 250,000 goats in the Galapagos Islands to save the dwindling population of Galapagos tortoises, and involved snipers picking goats off from helicopters. It ended up restoring the population of the tortoises.
jOJj TIL the Mona Lisa used to have eyebrows, but they were rubbed off through years of rough cleaning.