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TIL that the patient in the National Geographic best picture of 1987 depicting the famous 23hrs heart transplantation which shows the Doctor monitoring his vitals while the assistant rests in the corner not only survived but outlived the doctor.

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XEr1X TIL that Mary Ann and Charles Goodnight were responsible for the continued existence of pure American Bison and returned them from the verge of extinction.
epOLb TIL that Alcatraz, the famous high-security SF jail, was once a crucial military outpost in the Gold Rush years
a7ry TIL that after being attacked by a grizzly bear, a man spent 7 years and $150,000 to build a bear-proof suit to take revenge on the bear. When he found back the bear years later, he discovered that he was unable to chase the bear in the hilly forest since he only tested the suit on flat ground.
9wMv7 TIL The actress Nanette Fabray was one of the first people to perform sign language on television. Fabray was hearing impaired herself and an activist for the deaf. She would go on to be a founding member of the National Captioning Institute and decry loud background music on TV.
gMOay TIL Whenever you move your eyes quickly from one point to another point, there is a disconnect between your eyes and brain, so your perception of time stretches backwards slightly. This is why, when you first look at a clock, it appears to take longer than a second to move.