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TIL I learned there are no muscles in your fingers, which is part of the reason they get so cold (they also get cold because of the larger surface area as well. All the muscles that control finger motion are located in the hand and forearm.

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wLDE7 TIL Fred Rogers proposed to his wife Joanne via letter. When she received it, Joanne rushed to a payphone to respond. She was so nervous that when Fred answered the phone she was focused on the phone booth graffiti and greeted him by saying, "Shit." Fred laughed and she agreed to marry him.
lo60G TIL that before the Battle of Pratapgarh, Shivaji met with the enemy general Khan; prepared for treachery. He wore an armour under his clothes which saved him from being stabbed during a hug, to which he retaliated by disembowelling the general with Wolverine-style claws. The battle was won.
ZMya TIL that of all those killed as a result of high-speed police chases, 42 percent are innocent bystanders.
LkyDr TIL that one of the earliest instances of Phreaking, (hacking into telephone lines,) was discovered via blowing a Captain Crunch toy whistle into a phone line. This toy , coincidentally, rang at 2600 Hz, which is the exact tone that At&T used to determine that a caller had hung up.
9wAPD TIL that surveillance and assessment mechanisms are often unobtrusively woven into video games, allowing companies to build detailed profiles of the people playing the game. Researchers say the level of privacy intrusion is comparable to dating apps and social media platforms.