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TIL that in 1980, a US Airman dropped a wrench socket, which fell 80 feet and pierced a Titan II missile, causing rocket fuel to leak and eventually explode, ejecting the nuclear warhead to the edge of the launch complex.

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OGnE6 TIL: Turtle ant soldiers are tree-dwelling insects with strangely oversized heads, which they use to block the entrances of their nests, essentially acting as living doors.
E19lx TIL that one liter of tap water in most of Southern California has enough calcium to provide up to 10% of your daily calcium intake.
rNkA4 TIL that in 2006 a Panera that had a clause in their lease with White City Shopping Center in Shrewsbury, Massachusetts that prevented other sandwich shops from opening in said shopping center tried to sue in order to prevent a Qdoba Mexican Grill from opening in the same shopping center.
vPZNr TIL North American porcupines love salt and are known to eat backpackers’ road salt-covered boots left outside tents.
16OlD TIL of Lewis Harned, an American who served as an ambulance driver in WWII from 1943-45, attached to the British Army. He also served in the Gulf War, 45 years later, with the American Army, from 1990-91.