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TIL Teeth blackening, a custom of dyeing one's teeth black, is usually done during puberty. It was primarily done to preserve the teeth into old age, as it prevents tooth decay similar to the mechanism of modern dental sealants. It was seen as a sign of maturity, beauty, and of civilization.

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Yp4Od TIL about the Zambian space program in the 1960s, which aimed to send a woman (an afronaut) and 2 cats to the moon using a 2x3 metre drum rocket to establish a Christian ministry to the primitive martians
pEdQ TIL the US-Canada trade relationship is the largest in the world, surpassing even US-China trade. The amount of goods crossing the Windsor-Detroit bridge alone is larger than annual US-Japan trade.
dDZBK TIL The famous song "Lovin' You" by Minnie Riperton was about Maya Rudolph from Saturday Night Live who was only two years old at the time.
awbXy TIL killing a stork was punishable by death in Ancient Greek and they were honored by Muslims for flying to Mekka every year
xVrvg TIL about the origins of the term “Grandfather Clause.” It was a loophole in voter suppression laws that allowed voters that otherwise didn’t qualify to vote if their Grandfather could