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TIL About Einstein's "Year of Miracles". In one year he published 3 papers that changed modern physics. The first about the particle theory of light (won him his Nobel Prize), the second led to people accepting the existence of atoms, and the third introduced special relativity (E=mc^2). He was 26.

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VBb8Z TIL we arent born with the bacteria that causes cavities, its transmitted by saliva
5Va0Q TIL that Leonardo da Vinci’s Salvator Mundi became the most expensive painting ever sold at auction, fetching $450.3 million in 2017
GYANQ Dumping all our nuclear waste in a volcano does seem like a neat solution for destroying the roughly 29,000 tons of spent uranium fuel rods stockpiled around the world. But there's a critical standard that a volcano would have to meet to properly dispose of the stuff, explains Charlotte Rowe, a volcano geophysicist at Los Alamos National Laboratory. And that standard is heat. The lava would have to not only melt the fuel rods but also strip the uranium of its radioactivity.
OGNdX TIL in 1930 more than 65% of the US population went to the movies weekly. That means that out of every 5 people someone knew, 3 of them went out to the movies every week. Since around 1964, the portion of the US population to go to the movies every week has consistently been under 10%.
LkgNv TIL at the Teheran Conference, Stalin proposed executing 50,000–100,000 German officers. Roosevelt, believing Stalin was not serious, joked that "maybe 49,000 would be enough". Churchill ended up storming out of the room and did not come back until Stalin claimed that the proposal was a joke indeed.