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TIL that in 1909 two chemists invented an industrial process to harvest nitrogen from the air. Today, the nitrogen from that process keeps roughly 3.5 billion people alive.

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R7kgw TIL the nests (beds) that Chimpanzees make for themselves on tree tops are much cleaner, containing fewer microbes and parasites, compared to human beds.
6xZw TIL that to leave a social gathering without saying goodbye to anyone is called the “Irish goodbye” or the “French leave”. The French call it the “filer à l'anglaise”.
oBwBK TIL that Charles Vance Millar, a rich Canadian financier, made his will one last practical joke. In it, he left three men who hated each other a joint lifetime tenancy in a villa, some protestant ministers $700,000 in Catholic beer stock, and anti-horse racing advocates $25,000 in Jockey club stock.
BrExd TIL Cherokee Native Americans began purchasing African slaves in the 1800s to labor on European style plantations and in mines. By the time of the civil war they owned over 8000 slaves who made up 14% of the population in the Cherokee territory.
xVv05 TIL that in 1987, there were only 22 California Condors left on the planet. After an aggressive captive breeding and release program was implemented—where all of the birds were caught to help preserve the species—now there are 439 birds, 225 of which are in the wild.