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TIL that looping roller coaster the Flip Flap Railway in New York closed after 7 years in 1902 because of extreme G-forces. Riders experienced whiplash, neck and back injuries. Estimated Gs were in the 6 – 8 range.

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oaRL TIL the sewers of Bucharest are populated by thousands of children who moved there when orphanages were closed following the fall of Communism. Drug use, tuberculosis, and HIV are rampant, and their king is a man named Bruce Lee.
YpJnW TIL of Vladimir Pokhilko, the co-creator of Tetris. A Russian academic and clinical psychologist, he helped shaped the final version of the game with Alexey Pajitnov. He was in financial ruin later in life and killed his family and himself in 1998.
78oZ7 TIL that the Canadian courier company now known as Purolator got its name from the US maker of oil and air filters, which owned it from 1967-1987
WgMA TIL that Muhammad Ali was invited to North Korea in 1995 with a collection of other athletes. Though he didn’t speak much during the visit, at one function, as officials claimed they could take out the US or Japan whenever they wanted to, Ali declared loudly “no wonder we hate these motherfuckers.”
xEYB TIL that Japanese pufferfish make designs in the sandy seabed floor.