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TIL of XU, an intelligence agency that operated in Norway while it was occupied by the Nazis. Despite consisting of students at the University of Oslo and regular Norwegian workers, XU was able to survive being targeted by the Gestapo. The existence of XU was kept secret from the public till 1980.

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LNYd TIL: Americans create 250 million tons of trash, and 134 million tons ends up in landfills. By recycling and composting 87 million tons of our garbage, we eliminated more than 183 million metric tons of Co2, which is like getting rid of the annual emissions of 34 million cars.
EgJEx TIL that Technicolor is named after the Massachusetts Institute of Technology, where two of the founders of Technicolor, Inc., Herbert Kalmus and Daniel Frost Comstock, received their undergraduate degrees in 1904.
jWnM TIL The Great Wall of China is being stolen brick-by-brick by locals to build houses and also by visitors as souvenirs.
Y7a4W Today I learned that Druids gathered Mistletoe using Golden Sickles
9YnB6 TIL 99 years ago 4,500 tonnes of a mixture incl. ammonium nitrate fertilizer exploded at BASF in Oppau, Germany, killing 500-600 people, injuring 2000 more. The explosion, estimated to have 1–2 kilotonnes TNT equivalent, could still be heard more than 300km away in north-eastern France and Munich.