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TIL of Robert Peace, a ‘black guy from the hood’ who ended up graduating from Yale with honors in molecular biophysics and biochemistry, moving back to his 'hood’ and teaching biology at his old highschool, engineering his own strain of Marijuana and getting killed over a drug deal

YpEjB TIL Child labor in the United States was largely ended by a photographer named Lewis Wickes Hine. He took child laborers photos at eye level to humanize and personalize each child. He captured nearly identical pictures across the country to show lawmakers this was a systemic problem.
4EEo TIL that the famous photo of Albert Einstein sticking out his tongue was taken at the end of his 72nd birthday celebration. A photographer tried to persuade him to smile for the camera for a last time, but having smiled for photographers many times that day, Einstein stuck out his tongue instead.
GY9m7 TIL of the Chewbacca Defense, a legal tactic that confuses the jury rather than factually refuting the opponent's case. The term originated in an episode of "South Park" that satirized the closing argument of the O.J Simpson trial, and is now widely used.
0wpV1 TIL in 2008, the Netherlands voted "Swaffelen" as their word of the year. It means to repeatedly smack one's (usually either flaccid or semi-erect) penis against someone or something.
WkRjN TIL: There is an image that, if stared at for 15 minutes, will "burn in" for up to three months. Researchers call it the "McCollough Effect"