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TIL Antarctica's Dry Valleys haven't had any rain or snow in nearly 2 million years

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Lkpxr TIL that there is a mountain of evidence that humans can perceive colours that exist outside of the normal spectrum—they're called 'impossible colors' and they're quite literally indescribable
oxoA TIL the pH of the vagina is around 4.5, so there’s no such thing as a “basic bitch”
Y7vxP TIL Section 746 of the 2010 US Dodd–Frank Act, prohibiting securities trading based on non-public info misappropriated from a government source, is called the "Eddie Murphy Rule." The term comes from the 1984 film Trading Places, where characters used insider info to short-sell frozen orange juice.
NEjP TIL when Samuel Adams received a female slave as a wedding gift, he insisted that “a slave can not live in my house; if she comes she must be free.” He was able to free her after years of writing emancipation papers, and treated her as an equal family member throughout that time.
vPbx TIL in 1848 an iron rod exploded through the skull of a railroad foreman and landed 80 feet away. He was speaking and walking minutes later. The doctor didn’t believe him until a “teacupful of the brain” fell on the floor. He died 12 years later, after having portraits made of him holding the rod