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TIL cookies came from bakers making small “test cakes” to test the temperature of wood-fired ovens

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yO78 TIL that in the US during the 20th century life expectancy at birth increased by 60% for white men and more than doubled for black men.
xVWL5 TIL that most of the heat produced by objects entering earth's atmosphere at high speed is caused by the compression of the air in front of the object, and not friction.
9Yx66 TIL a professor at Baylor University started the Black Gospel Music Restoration Project by collecting thousands of songs and photos from the 1940s to the 1980s, and these lost pieces of history are available online, free of charge.
LQ50P TIL that the cover of The Doors’ 1970 album “Morrison Hotel” was taken at an actual Morrison Hotel in LA. The band was not given permission to photograph, so they did it while the clerk was away from the desk. The band jumped right behind the windows and hit their places without shuffling.
7rLyp TIL Nias language is the only language in Indonesia that has a voiced bilabial trill sound /ʙ/.