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TIL the FAA requires pilots to wait 6 hours after taking Viagra to be able to fly a plane. This is due to a side effect of Viagra that makes blue-green color differentiation difficult. Pilots call the waiting period the “Viagra-to-throttle time”.

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oBYB7 TIL that Nick Newton, the inventor of the starting block, had no athletic experience and was a heavy smoker until his forties. After his daughter became involved in track, he became a Masters sprinter and set records even after surviving testicular cancer
XEMKj TIL Sir Isaac Newton had a dog called “Diamond” who knocked over a candle and set fire to twenty years worth of his research.
9av6 TIL Russia has to bomb their rivers every winter to prevent dangerous flooding caused by ice dams.
yOnV TIL that according to the 1995 census, the majority of American Indians prefer the term “Indian” over “Native American” in referring to them.
9Ydr7 TIL that In the year 1006, there was a supernova 7200 lightyears away from Earth, which was bright enough to cast shadows, and was visible during the daytime