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TIL in 2001: A Space Odyssey, HAL 9000 incorrectly predicts a ‘mate in two’ in a chess game with the astronaut. Fans have speculated whether this was a filmmaking error, a test by HAL of the human’s reliability, or an early sign that HAL is malfunctioning. Kubrick died without revealing the answer.

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Yp8DG TIL that the single most destructive air attack of WWII was not from an atomic bomb.
xaM0 TIL North Korea is the only country where the possession, sale, and cultivation of cannabis is completely legal.
VBO7m TIL During World War II, the U.S. Navy constructed a floating concrete barge dedicated to making ice cream for troops in the Pacific Theater. The barge, known as the "Concrete Ice Cream Barge," had industrial-sized freezers and churned out thousands of gallons of ice cream daily.
16lEr TIL The youngest person confirmed to have been hanged in England was Michael Hamond, aged just seven. He was hanged in King's Lynn, Norfolk, next to his sister Ann, who was 11 at the time.
5gBk TIL that fire extinguishers used to be color coded based on what was inside; today, each one has pictures on it that show what kinds of fires it can fight.