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TIL a trial by combat in medieval France took place between a King's bodyguard and a Greyhound. The Greyhound attacked the guard in the street so often that people suspected he had murdered the dog's owner. He confessed when the greyhound pinned him to the ground in the duel and was hung.

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OGO6a TIL that a tiny songbird called the Northern Wheatear (weighing only about 25 grams) migrates nearly 29,000 kilometers round trip each year, from Alaska to sub-Saharan Africa and back, making one of the longest known migrations relative to body size of any songbird
o6DK TIL a canadian 15-year-old boy discovered a Mayan city correlating constellations and the location of Mayan cities.
RKAa TIL There is a man who digs up antique denim left in old abandoned silver mines. When a miner got a new pair of work pants, he’d cut up the old ones and use them for lagging around pipes. Collectors pay thousands of dollars for jeans, jackets and even scraps of denim
Bga4y TIL: The text written on the Rosetta Stone is known as the Decree of Memphis. It was written to confirm the royal cult of Ptolemy V (196 BC). Although the Rosetta Stone is the most well known example of the decree, 13 other copies exist. The decree was to be displayed in temples throughout Egypt.
j8E TIL that since 2010, ps3 uses an audio watermark algorithm to detect illegal movie copies. It can survive compression, re-encoding and microphone recording yet it is imperceptible to human hearing.