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TIL the word “vagina” originated from the Latin word for “sword sheathe.”

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gdmD TIL humans can have black irises, and red is the most rare of eye colors.
v1xJR TIL that Scooby-Doo got his name from a character named Scooby the Seal, from an earlier Hanna-Barbera series "Moby Dick and Mighty Mightor". Both characters were voiced by Don Messick.
K5VQ TIL that the gravitational pull of the earth had deformed the moon towards being the shape of a lemon.
wLdp7 TIL Pink Himalayan Salt is one of the most expensive salts in the world. People claim it contains more minerals than ordinary table salt. Scientists found the amount of minerals it contains is so miniscule that it makes no measurable difference.
8Gga TIL that in 1927 several million people in the United States sent over 100,000 petitions urging Congress to adopt the metric system.