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TIL Stop signs originated in Michigan in 1915. The first ones had black lettering on a white background and were 24 by 24 inches, somewhat smaller than the current sign.

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kOBM1 TIL there is a philosophical concept called the explanatory gap which is used to describe the inability to describe concepts. For instance, it is impossible to describe a color to a blind person and have them accurately understand and visualize that color.
rNEV1 TIL Einstein’s brain was stolen by a doctor during the autopsy after his death. The doctor kept it for 50 years, gave pieces of it to colleagues and kept it in a closet
50DP TIL There was a contest in 2003 to find which building in the world was the most penis-shaped.
W499 TIL Beethoven hated giving piano lessons unless they were for exceptionally talented students or attractive young women of whatever talent. He was also a notorious space cadet and never learned how to multiply or divide
nbDo TIL In 1918, a black man named Laurence C Jones survived a lynching attempt from a white mob by convincing them of his passion to educate Black kids. The mob ended up collecting money for his cause.