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TIL Facebook collects so much user data that it can help a computer program predict your personality more accurately than your friends and family.

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QP76 TIL that throughout the 20th century, boys were preferred over girls as babysitters because 1) Teenage girls were dismissed as flighty and self-absorbed; and 2) young boys needed male role models.
dDmYr TIL Whales are colorblind and see the world only in black and white
1jA7 TIL there was a roman emperor who had been reported to be “delighted to be called the mistress, the wife, the queen of Hierocles”, regularly wearing makeup and offering a vast sum of money to a physician capable of giving him a sex change
x6jbg TIL about Nan Madol, a city built on several artificial islands in Micronesia which was the capital of the Saudeleur Dynasty. It had 25000 inhabitants and lasted from 1st century BCE to 1628 CE.
4XBMg TIL Bill Gates succeeded in his mission to build a Toilet to help combat the sanitary crisis across multiple parts of Africa and India. Costing $350, its powered by worms, and doesnt require to be hooked up to a sewer system.