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TIL Electric fish in saltwater are 'wired' in parallel, but in freshwater they are 'wired' in series. This change overcomes the higher resistance of freshwater.

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gpLX TIL Winston Churchill presented Joseph Stalin with a ceremonial Sword of Stalingrad in 1943. It was constructed of gold, silver, and crystal. Stalin kissed the sword and handed it to Marshal Voroshilov - who promptly dropped it.
Mj5A TIL during China’s Ming Dynasty, powdered smallpox scabs were blown up the noses of the healthy. The patients would then develop a mild case of the disease, & from then on were immune to it. Although the technique had a 0.5–2.0% mortality rate, it was better than the diseases 20–30% mortality rate.
R45a TIL: The soft inner part of bread is called the Crumb, not to be confused with crumbs
6Ekkl TIL some plants can generate their own body heat, like mammals. They are called thermogenic plants.
ANNXB TIL that Michael Jordan has the highest vertical leap in NBA history.