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TIL the red liquid that seeps out of steaks isn't blood, it's myoglobin, a muscle protein

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M7X5B TIL about Enforcers, an unofficial role in ice hockey who's job is to deter dirty or violent plays by the opposition by responding with more violence.
p8jO4 TIL that there's a national Rotten Sneaker Contest in the US that's gone on since the 1970s. The person with the nastiest sneakers/other sports shoes wins, and gets $2,500. It's a marketing campaign for Odor-Eaters, for ages 5-15.
Oo184 TIL the original story of Aladdin in One Thousand And One Nights, was actually set in Western China and the main character is a young Chinese Muslim.
xVbZg TIL the net contribution of the world's oxygen by forests is zero. The real 'lungs of the earth' are phytoplankton living in the oceans.
9w70Q TIL, The only letter not used in the Periodic Table is the letter J.