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TIL Nikolas Tesla rejected Einstein’s Theory of Relativity on claims of discoveries that he worked out a dynamic theory of gravity which he never published.

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R7MWl TIL that when The Simpsons portrayed Mr Burns as a Casino owner slowly losing his mind, they did not just include random "crazy" behaviours. They were all based off a real person, business magnate Howard Hughes.
p8Q1p TIL The symbol "℞", sometimes transliterated as "Rx", is recorded in 16th century manuscripts as an abbreviation of the late Latin instruction recipe, meaning 'take thou'. Originally abbreviated Rc, the later convention of using a slash to indicate abbreviation resulted in the modern common symbol.
lo5MN TIL Anaphylaxis isn't always a sudden, dramatic reaction, and can come on slowly, with only a few mild-appearing symptoms for up to 20 minutes after exposure. It can also come back for another round of symptoms hours after, which is why getting immediate medical attention is so important.
rRmGe TIL a man was actually set on fire for the cover of Pink Floyd's "Wish You Were Here" album. An unexpected change in wind direction during the shoot caused stuntman Ronnie Rondell's mustache to catch on fire and burn off.
lGO5 TIL that a man known as “waterman of India” revived 5 rivers and brought water back to 1000 villages in India using native water-preservation techniques.