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TIL President Kennedy was prescribed a rocking chair for back pain. He found one he liked so much he bought 14 copies for the Oval Office, Camp David, Air Force One, and homes of his family. He also gifted them to heads of state.

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yGoa TIL that cosmonaut Sergei Avdeyev has traveled 0.02 seconds into the future. The theory of relativity states that time will slow down for an object as its velocity increases. By orbiting at 27,360 km/h for 747 days aboard the Mir space station, Avdeyev aged 0.02 seconds less than people on Earth.
R5KLQ TIL that the Red River Floodway, a channel built in the 60's to protect Winnipeg, Canada from flood damage by diverting excess river flow around the city, was the second largest earth-moving project at the time, even more than the Suez Canal. It was surpassed only by the Panama Canal.
m1WQM TIL that in WWII, American bombers dropped empty beer bottles as noise makers to confuse Japanese sound-locator flak gun directors, and in other cases to frighten and confuse Japanese troops to keep them awake all night before an Allied attack.
p84XO Today I learned that, in the 1920's, a new "fixed length" calendar with 13 months of 28 days each, was voted in by a League of Nations special committee. Although this calendar never gained widespread adoption, it remained the official calendar of the Kodak company until 1989.
wJPJ TIL that it’s the fear of stress, rather than the stress itself, that causes health problems. By viewing stressful situations as a positive and challenging experience, you remove almost all health issues associated with stress.