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TIL a valley settlement in Norway that lives in shadow for nearly half of every year has installed giant mirrors on an adjacent mountain to redirect sunlight into the town’s square, all based on a plan that was thought up 100 years ago.

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9epm TIL Japanese honey bees defend against Japanese giant hornets by forming a tight ball around the offending hornet. Vibrating their wings, the bees create and direct enough heat to the centre of the formation that it becomes lethal to the hornet.
E1EV7 TIL that it's possible for a human to dissolve in Yellowstone's hot springs. On June 7, 2016, Colin Scott slipped and tumbled into the acidic boiling waters of the Norris Geyser while looking for a hot spot to soak in. Scott had illegally ventured off the boardwalk and within 24hrs he dissolved.
4ED5 TIL a man deposited a junk promotional check as a joke at his bank and they accepted it, putting $95K into his account.
epZn6 TIL there’s a book called the Voynich Manuscript that’s written in a language no one can understand, leaving its secrets locked away.
7OGZ TIL that the yakuza has a written exam for it’s prospective members who have to pass it to join the yakuza. Topics range from theft consequences to illegal dumping.