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TIL Crab mentality is a way of thinking best described by the phrase, "If I can't have it, neither can you." The metaphor refers to a pattern of behavior noted in crabs when they are trapped in a bucket.

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9Gg7 TIL that in 1984 Mcdonalds offered free Big Macs,Fries, or a Coke for each Gold Silver or Bronze in the Olympics. During that year the Soviet Union boycotted the US olympics and therefore the US got many more medals than expected which became a huge failure for Mcdonalds
XENrj TIL that metric paper sizes (like A4) reflect the number of equal cuts from an A0 sheet (1 square meter). So A1 is 0.5 sq meter, A2 is 0.25, etc. with all sizes of equal proportions. The closest to US letter paper is A4, which measures 210 x 297mm (8.3 x 11.7 inch, close to US letter 8.5 x 11 inch).
GYZZg TIL cigarette butts are a huge threat to marine life, each one contaminating 40 liters of ground water for at least 7 days, exposing over 7000 toxins in the environment and taking up to 10 years to break down.
XEVpQ TIL about the Black Sapote or Chocolate Pudding Fruit. When ripe, the fruit has the texture and taste of chocolate, and can be used as a substitute in recipes or milkshakes. It also contains 4 times as much vitamin C as an orange.
DQ1Nr TIL a supposedly cursed Lipinski Stradivarius violin was stolen by a small-time weed dealer from Milwaukee who became obsessed with the violin while pretending to be a high-end art thief.