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TIL, in 1946 NACA (now known as NASA) subjected a human test subject to winds of up to 457mph in the name of science.

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jNdWj TIL a blue whale's heart can weigh in excess of 1,300 lbs and be the size of a small car. Their hearts beat at a rate of 8–10 beats per minute and can be heard from over 2 miles away.
R7l07 TIL that in 1924, H. P. Lovecraft was hired to ghostwrite a story for Harry Houdini about Houdini's supposedly true escape from an Egyptian cult. Lovecraft lost the only copy on the way to his own wedding, and spent much of his honeymoon rewriting it with his wife's help.
nYO9 TIL the world’s fastest camera records at 4.4trillion frames per second at a resolution of 450x450 and is capable of recording individual photons.
5VYER TIL In 1956, a woman was awarded $300 in damages by the city of Miami after she was hit on the foot by a falling coconut. It was argued that the city should have been on notice that the coconut was a hazard, because "a reasonable man would assume it was about to fall when it turns brown".
GYedJ TIL: British stole and scammed India out of $45 trillion [adjusted], over 173 years of imperial control