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TIL William Horatio Bates developed a method of treating nearsightedness that involved using a lens to focus sunlight directly onto a patient's eyes

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E1Rvx TIL that the last time Yellowstone erupted, it spewed 240 cubic MILES of debris into the atmosphere.
DOMv TIL James Earl Jones was a functional mute for 8 years due to a stutter he had developed as a child. He credits his English teacher, Donald Crouch, with helping him end his silence. Crouch believed forced public speaking would help Jones gain confidence and insisted he recite a poem every day.
76L TIL that Abraham Lincoln’s voice was very high and even remarked as “shrill”
R5ok9 TIL the “20Q” (20 questions) handheld game, a toy released in 2003 and famous for its scary level of accuracy, actually used a basic implementation of an AI neural network. It used training data gathered from users of a web-browser based implementation of the game which launched in 1994.
Wky79 TIL children can regrow amputated fingertips. In 2016, when a 7-year-old girl's fingertip was torn off, surgeons stuck the tip back on to protect the wound but told the parents that it would likely die. Eight days later it had died, and in its place had grown a perfectly functional new one.