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TIL the reason cats flex (also called kneading) their claws when sitting on your lap is due to a behavior from when it was a kitten. The kitten has to flex its claws around the mothers nipple in order to get it to start lactating. In adulthood its just re triggered from being nurtured

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j6eNX TIL Hezekiah's Tunnel is a collection of tunnels in the rock beneath Jerusalem. It was built around 700 BCE to prepare for a siege by the Assyrians. Some of them are still used.
gMmjW TIL about a 17th Century Swordswoman called Julie d'Aubigny, who fell in love with a nun at a convent. In order to run away with her new love, she stole the body of a dead nun, placed it in the bed of her lover, and set the room on fire to cover their escape.
rRDyo TIL A 4th century female poet wrote a poem on a 29 x 29 grid of characters that produced 3000 more rhyming poems when read in different directions.
8aA5a TIL that Robert Kraft Donated $100,000 To A Massachusetts Anti-Sex Trafficking Group In 2015
v1wlx TIL Benjamin Franklin attempted to predict the death of his competitor, Titan Leeds. When Leeds was still alive he posted an obituary anyways. When Leeds challenged it, Franklin insisted he was an imposter. When Leeds died in 1738 Franklin publicly commended the impostors for ending their charade