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TIL some women have superhuman vision, seeing 100 million colors due to the genetic mutation: tetrachromacy. The rest of us see 1% or less of that. They see 100x variations in color that appear the same to everyone else. A path of dull grey stones may look like a glittering jewellery box to them

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R7DM4 TIL that within the animal kingdom, only higher primates (including humans) and guinea pigs are unable to synthesize Vitamin C in their own bodies, thus putting them at risk of scurvy
oBAMW TIL the city of Philadelphia, which was where Washington had to live when he was president, had laws in place that said any slave that lived there for more than 6 months would be freed. So, Washington set up a rotational schedule exchanging his slaves between states to prevent their freedom.
ne4Jo TIL of Centralia, PA: A town mostly abandoned since an underground mine fire started in 1962 and still burns to this day. In 2002 the town had its zip code revoked after the graves started burning. The EPA warns: “Walking and/or driving in the immediate area could result in serious injury or death.”
rNdMW TIL before his career took off, Patrick Swayze and his wife had a carpentry business. Though Swayze didn’t know much about carpentry at first, he learned a lot through books, and their business ended being very profitable. At one point, they even renovated the kitchen of actress Jaclyn Smith.
dDmwd TIL all 658 employees at Cantor Fitzgerald who had offices in the World Trade Center were killed representing the single largest loss among any single organization in the attacks