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TIL that Germans are the largest immigrant group in the USA, accounting for approximately 17% of the population (roughly 49 million people)

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en7g TIL Dante Alighieri author of The Divine Comedy died a few hours after writing the final lines of paradise the third section of The Divine Comedy
nW4A9 TIL about the Index Thomisticus, a 34 year long project beginning in 1946 to make a machine readable concordance of the works of Thomas Aquinas, that required manually recording 10,631,980 Latin words onto punched cards and took a total of 1 million hours of human work to complete
ROA4 TIL Fire rainbows are a rare cloud phenomenon formed by hexagonal ice crystals in high level cirrus clouds. The halo is so large that the arc appears parallel to the horizon. They are called fire rainbows because they appear like a flame.
JYA01 TIL what exactly causes ice circles and other obscure snow and ice formations like snow rollers and ice pancakes to appear each winter
wod78 TIL that the sun is not big enough to become a black hole.