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TIL the Futurama theme song is a remix of the song Psyche Rock by Pierre Henry from 1967

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Mlv0 Today I learned that in 1983, Russian Lieutenant Colonel Stanislav Petrov heroically prevented a full retaliatory nuclear attack against the United States and NATO allies when his Oko nuclear early warning system detected 6 missiles coming from the U.S. and he immediately declared it a false alarm.
d8DdZ TIL there is a "boiling river" in Peru where over 6 km of the river can reach temperatures as high as 86C/187F. The river is considered extremely remarkable due to the nearest volcanic system being more than 700 km away.
rxAw TIL that bonsai trees have to be planted off centre because the centre symbolizes where heaven and earth meet and therefore should be left unoccupied.
Wkkp9 TIL that when the Sears magazine printers switched from a thin, newspaper-like stock to a more modern glossy paper stock, people wrote in to the company to complain that the magazine couldn't be used for toilet paper anymore.
JYp9B TIL that live squirrel monkeys were advertised - for real - for sale on the back of comics and magazines in the late 60’s/early 70’s. They sold for the low low price of $18.95. Many were purchased by children. Many of the monkeys attacked when opened. The attached is just one account.