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TIL of the Canadian Shield.The Shield makes up roughly 50 per cent of Canada’s land mass, was formed over 3 billion years through processes such as plate tectonics, erosion and glaciation, and contains some of the oldest known rocks on Earth.

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0adv TIL There are 5 so called “Lagrangian Points” wherein the gravitational effects from the Sun and Earth balance out. These points would act as a solar parking space for objects within their limits.
LYe9 TIL That at the outbreak of the 1973 Yom Kippor War, Israeli forces of just 3,000 troops, 180 tanks and 60 artillery were able to halt the advance of a Syrian force of 28,000 troops, 800 tanks and 600 artillery until reservists were mobilised
6EWpQ TIL that in 1966 after failing for 3 years to extinguish a gas well fire Soviet authorities decided to use a 30kt atomic bomb. It was detonated at a depth of 1,500m, crushing the well and extinguishing the flames in seconds. Following this success the same technique was use on 4 other well fires.
lonrK TIL a farmer hid the construction and existence of a 4-bedroom castle under a huge pile of hay bales for 6 years. When he thought he’d outlasted the statute of limitations, he unveiled it to the public, the city council found out, and immediately ordered its destruction.
rNVkw TIL that, in some places, an illiterate person can sign legal documents by making a simple mark, like an "X" or a personal symbol, as long as a literate witness also signs.