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TIL the albumen print used emulsion of (actual) egg whites and silver nitrate to bind the photographic chemicals to the paper.

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kDjW TIL in baseball, a left-handed specialist is a relief pitcher who throws left-handed and specializes in pitching to left-handed batters. They frequently enjoy long careers since their pitching arm suffers less stress.
VB7gD TIL Fresca and Squirt are grapefruit-flavored. I've never tried them but I always assumed they were lemon-lime flavored like Sprite/Sierra Mist/7-Up. As an avowed dipsomaniac, this revelation is a complete game-changer.
nWKd7 TIL of barnacles - marine arthropods which - after a point in their life-cycle - live permanently attached to substrate - this is problematic, since they reproduce sexually - a penis of up to eight times their body length! - resolves this issue, allowing them to mate across vast distances.
GYN7N TIL 70 percent of the world’s Macadamia Nuts came from one tree in Australia. All of Hawaii’s macadamias share distinctive markers with a tiny wild grouping of trees in Gympie, suggesting that all of the state’s modern crops were likely cloned out of a single Australian tree.
R5ngj TIL about actor Rip Torn, who, while off his guts on drugs and lack of sleep, attacked writer Norman Mailer with a hammer. On camera.