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TIL In 1986, 1.6 million tonnes of CO2 erupted from Lake Nyos in Cameroon, displacing all the air and suffocating some 1,700 people within 25 kilometers of the lake.

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v1Jl4 TIL there is a 15th century French chapel in Milwaukee, Wisconsin.
4XJ8R TIL That around 40% of US homicides remain unsolved.
bO0N TIL Benjamin Franklin was the only man to sign the Constitution, Declaration of Independence, and the Treaty of Paris of 1776.
dGej TIL the slowest musical piece in history, As SLow aS Possible (ASLSP) by John Cage, is currently being played for the next 639 years. It started 2001 and the last note change was in 2013.
wolWY TIL Descartes was about to publish "The World" in 1633 but then he learned that Galileo had been condemned for publishing the view that the Earth revolves around the Sun. Descartes suppressed his book but still hoped that his physics would one day be taught in Catholic schools