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TIL each person has a “walking signature” that can be detected by their smartphone’s accelerometer data; the signature persists even if you change phones

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oB9aA TIL Every US military working dog is an NCO - in tradition at least. Some say the custom was to prevent handlers from mistreating their dogs; hence, a dog is always one rank higher than its handler.
GYBGj TIL of the USS New York, a ship in the US Navy forged partially from steel that was salvaged from the World Trade Center after it was destroyed in 9/11. The ship's motto is "Strength forged through sacrifice. Never forget."
Qyxd TIL that in Japan there is a robot that wins rock paper scissors 100% of the time (guaranteed)
8adlZ TIL about Nikolai Vavilov, a Soviet botanist whose aim was to end hunger worldwide. He collected seeds of wild crops and deposited them in a seedbank in which to produce new strains of crops. Stalin denounced him and used him as a scapegoat for a famine. He died in prison from starvation.
d88nZ Doctors still don’t know what causes it, or how to stop it