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TIL ancient Romans used urine as mouthwash…

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N7VB1 TIL a good healthy kidney from Israel goes for about $160,000 on the black market and a kidney from India goes for $20,000
b6rQQ TIL that sodium batteries are a solid alternative to lithium batteries in industrial environments. Sodium is more abundant (500x) and cheaper than lithium. They are also considered safer (non-flammable). Energy density needs to improve for them to work for EV cars
lPZa TIL There is a pink kryptonite that turns superman gay
LZ9v TIL During WW2, a US politician got 800 sailors killed after bragging to the press about the Japanese setting off depth charges too early.
GANL5 TIL, "Ratfucking" which means the pillaging of the most desirable part of Meal, Ready-to-Eat (MRE) is common in the US military. In this situation, the more senior personnel will open up the packages, take the best ones of each MRE packages while leaving the trash ones for the newbies.