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TIL prior to the flu pandemic (1918) being reported in St. Louis, Dr. Max Starkloff had local physicians on high alert and wrote about the importance of avoiding crowds. As health commissioner he closed schools, theaters, and prohibited public gatherings. The city had the lowest U.S. mortality rate.

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yQaV TIL the former head of the TSA thinks airport security is a waste of time and effort.
MeyDm TIL the Ozone layer is healing and is expected to do a full recovery by 2060.
KO4B TIL that in 1913 a Slovakian coal miner invented a parachute skirt. He demonstrated it by jumping off a building in Washington within eye shot of the U.S. Patent Office.
d8a4K TIL, that airplane windows are round because where there’s a corner, there’s a weak spot. Windows, having four corners, have four potential weak spots, making them likely to crash under stress – such as air pressure.
5Y0Q TIL Walmart store openings since 1962 mimic the patterns of a biological invasion or an epidemic.