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TIL Microsoft Kinect sensors protect the Korean Demilitarized Zone for South Korea. They’re more accurate than other sensors which would occasionally give false alarms from falling leaves.

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vVAB TIL some Black Friday products (i.e. cheaper TVs) are made specifically to be sold only on Black Friday, and are of lower quality than usual
60aY TIL: Stephen Colbert Helped Fund $800,000 in Grants for South Carolina Teachers
D15XJ TIL In 1948, a man pinned under a tractor used his pocketknife to scratch the words "In case I die in this mess I leave all to the wife. Cecil Geo Harris" onto the fender. He did die and the message was accepted in court. It has served as a precedent ever since for cases of holographic wills.
5Yg0D TIL that Wolfenstein's B.J. Blazkowicz is the father of Billy Blaze from Commander Keen, who grew up to become the father of Doomguy, meaning Wolfenstein is a prequel to Doom.
16oVO TIL a young Thomas Edison helped another inventor, Samuel Laws, design telegraph machines. He expected to be paid a few hundred dollars but Laws instead gave $40,000, which allowed Edison to afford a new research laboratory and factory. There, he amassed 300 employees and developed 50 inventions.