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TIL for most engineering, scientific, and everyday computer calculations, only about 15 to 17 decimal places of Pi are used, because this matches the precision of double-precision floating-point numbers, the standard format for numerical calculations in modern processors

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mxZMo TIL that approximately 1.6 million people of Japanese descent live Brazil. The largest Japanese population outside of Japan.
ADV7g TIL British Airways used to have a fleet of Chinook Helicopters. One was involved in Europe's most deadly helicopter crash in 1986.
BrodD TIL that Theodore Roosevelt declared war on banana peels!
Rxw6 TIL a 2011 Johns Hopkins study gave healthy adults a few sessions of Psilocybin (magic mushrooms). A year later, 94% of the individuals said the experiment was in their top 5 most meaningful experiences of their lives; 39% said it was the single most meaningful experience of their lives.
e9MJ TIL after 27 years in the MLB, at age 46, Nolan Ryan’s final pitch clocked in at 89 mph. He had a lifetime winning percentage of .526, was an eight-time MLB All-Star, and his 5,714 career strikeouts rank first in baseball history. Ryan also threw a record 7 no-hitters, 3 more than any pitcher.