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TIL after the Apollo 11 crew returned to Earth, they were quarantined for 3 weeks to prevent any possible microbes from the Moon infecting Earth. However, Buzz Aldrin saw ants crawling in and out of cracks in the concrete, meaning even smaller microbes could have gotten in and out of quarantine.

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via reddit.com

aw8eb TIL There is a man selling stocks of his decisionmaking. He calls it "Community Through Capitalism."
jyNX TIL the English word “window” comes from the old Norse word “vindagua”, literally “wind eye”.
0XeA TIL that with the aim of launching guerrilla operations against the Chinese, the CIA funded the Dalai Lama $1.7 million a year in the 1960s
KYEQ4 TIL users of the foot fetish site WikiFeet were involved in debunking a hoax involving a picture of a woman's feet in a bathtub, purported to be a nude posted online by a US congresswoman. The site's users identified the true owner of the feet, with the short toe length being a key piece of evidence
r76M TIL there’s a line of 70 foot long concrete arrows that bisects the country longitudinally all the way from San Francisco to New York City. They’re from the pre-digital age and were installed by the Federal gov’t in 1924 with 50’ tall towers with rotating gas-powered lights to aid lost pilots.