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TIL A man named Dean Karnazes has a physiological advantage in that he doesn't seem to have a lactate threshold; thus was able to run 350 miles in 3 days without sleep

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LQEBr TIL that in 1942, Manhattan Project needed 5000 tons of copper, which was in short supply; to avoid delays, it borrowed 430 million troy ounces of silver from US Treasury to be used in magnets. The silver was fully returned by 1970 as the equipment was decommisioned.
QJn0L Whenever you're ready to fly again, be prepared: air travel after the coronavirus will look and feel a lot different from the last time you boarded a plane.
Qp5E TIL that people who post Facebook status updates about their romantic partner are more likely to have low self-esteem, while those who brag about diets, exercise, and accomplishments are typically narcissists
KXQR TIL that in 1967, the first woman to run the Boston Marathon as a numbered entry was chased by the race organizer shouting “Get the hell out of my race and give me those numbers” while her boyfriend and other male runners provided a protective shield.
xrvb TIL Knocker Upper , before alarm clockswere affordable or reliable. A knocker-up’s job was to rouse sleeping people so they could get to work on time. They used a truncheon or short, heavy stick to knock on the clients’ doors or a long and light stick to reach windows on higher floors.