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TIL Sweden's main battle tank during the Cold War didn't have a turret. The Stridsvagn 103's autoloading cannon ran almost the entire length of the vehicle and was traversed by engaging the tracks and elevated by adjusting the hull suspension.

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awBa9 TIL Obsidian Blades are so sharp that they can cut cells and DNA. They are used are used in modern medicine because the sharp blades create incisions which heal faster.
0wd51 TIL of Frantisek Zahradka. He was arrested in 1949 in Czechoslovakia when he was in high school for assisting people to cross the border. He spent two years in solitary, and 18 years was forced to mine uranium ore for the government.
neQbd TIL how Pringles are made. They start off with potato dough, the dough is cut into potato-dough cookies, molded into curves, deep-fried, blown-dried, salted, stacked into cans and sold.
x6eZk TIL as recently as 2011, Dr Pepper ran an ad campaign with the slogan “Dr Pepper: IT’S NOT FOR WOMEN”. There was even a Facebook page that only men could access, where men would shoot at “girlie” things like flowers and rainbows.
6Ew47 TIL about the Ice block expedition of 1959. Glassvatt successfully transported 3 tons of ice from Mo i Rana to Libreville without any refrigeration , losing only 11% of ice weight in the journey which took 27 days to complete over 10,000 km(~6200miles).