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TIL that the deepest note mankind has ever detected is a B♭ that is 57 octaves below middle C. The sound is made by inflating plasma bubbles in the center of the Perseus Cluster.

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yo5X TIL the indigenous people of Bougainville Island successfully carried out the world’s first “eco-revolution” closing down one of the world’s largest mines, driving away private security and in turn the Papua New Guinea and Australian army using home-made weapons and running vehicles on coconut oil
4XDZw TIL in 2016 a Forest Service Officer named Brad Treat took a blind turn while mountain biking at 30 mph. He crashed into a large grizzly bear that was sitting on the trail and was immediately mauled to death in response to the collision.
PYVrJ TIL The history of animated characters wearing white gloves has ties to caricaturing black people, partially inspired from minstrels who often wore them during shows, as well as jazz which influenced many early 1900's cartoons. It was also practical to help distinguish hands from their black bodies.
rVAW TIL that when Coca-Cola wanted to raise the price of the drink in the 1950s, they avoided moving to a price that required the use of more than a single coin (5¢), so they created vending machines where one in every nine bottles was empty so some people would have to pay 10¢ to get a drink
AN6pd TIL: The "Simple Sabotage Field Manual" was declassified in 2008 and it contains advice on how spies can sabotage the enemy by just being maliciously incompetent. Advice include praising inefficient coworkers, cry and sob frequently at work, asking inane questions in meetings, and spreading gossip.