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Today I learned the music video from "Wham - Last Christmas" was remastered in 4k by tracking down the original tapes. Here is a comparison.

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via reddit.com

dDya9 TIL of Wojtek, a Syrian brown bear enlisted as a soldier in the Polish army during WW2. His service consisted of carrying large boxes of ammunition, boxes that would require four men to carry. The bear learnt his duties by mimicking the men on his unit; his efforts earning him the rank of corporal.
8a5wK TIL: ancient Athenians used Sortition (selection by lottery) to appoint public officials from a large pool of candidates. It was a pillar of their democracy. All competent and interested parties had equal chance of holding public office (minimizing Partisanship). Elections, by contrast, foster it..
N74n8 TIL The Columbine shooters had placed two propane bombs in the cafeteria which failed to explode due to poor construction and faulty wiring. Had those bombs detonated as planned, they would have likely killed or wounded all 488 students in the cafeteria
x60OB TIL that the hawk-eye technology, used for video assistance in sports like soccer and tennis, was first implemented in a 2001 cricket match between England and Pakistan.
x6Ol7 TIL prairie dogs have their own language to communicate incredibly specific information like what color shirt a guys wearing or how fast an animal is approaching. They even have a cute jump-yip that looks like they’re throwing their hands in the air, celebrating when they’re safe from danger