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TIL The last united states aircraft to be shot down in combat was by another united states aircraft

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epr7J TIL more than 40% of Japanese companies allow employees to work four days or fewer in the office
660J TIL there are things called metamaterials that are artificially engineered materials with properties not found in nature. These properties are the result of their precisely designed structure. Some have the ability to reverse the refractive index, allowing for the possibility of superlenses.
loxe5 TIL former Chinese leader Wen Jiabao died a billionaire, but is portrayed by Chinese media as a frugal man of relative means, revering him to the commoners. Any information about his wealth is strictly censored on the Chinese internet.
yQZ5p TIL that pounds are abbreviated to "lbs" because it is derived from the ancient Roman unit of measure "libra pondo", meaning "a pound by weight". "Pounds" came from the "pondo" part while "lbs" is an abbreviation of the "libra" part.
8gp4 TIL 1 Pt of Water, mixed with 6 tsp sugar, and ½ tsp salt is the best oral rehydration solution - per the WHO. Better than water alone, better than sports drinks, and cheap is hell.