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TIL less humid air increases atmospheric pressure. Air is mostly nitrogen (78%) and oxygen (21%). Water vapor is less dense than air because hydrogen is lighter, so it displaces heavier gases, reducing air density and lowering pressure when humidity is high

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ReL6 TIL that Andrew Jackson’s political opponents referred to him as jackass. He adopted the name and used it as his campaign symbol. It would eventually become the symbol of the entire Democratic Party
wLWrW TIL a 2015 study found that people were twice as likely to post a picture of a cat than a selfie online. There were more views per video of cats than of any other category of YouTube, & people didn't feel guilty about watching them instead of doing what they should've been doing
6EL1l TIL that one of the charges against Marie Antoinette included incestuous relations with her son Louis-Charles, who was forced to testify that his mother had molested him. After a two-day show trial, an all-male jury found the former queen guilty on all charges and unanimously condemned her to death.
xvXk TIL that Bill Murray had no scripted lines in the movie Caddyshack. He improvised everything. “With the Dalai Lama scene, they just sort of tossed me in there – there wasn’t much of anything. I just took it and ran away with it…Improvising about golf was easy for me.”
6E1lJ TIL that Simon Tatham, creator of the popular terminal emulator PuTTY, suffers from a condition known as anosmia, meaning he does not have a sense of smell.