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TIL Stephen Hawking once sent his PhD student away with a very hard problem – finding exact rotating black hole solutions of Einstein’s equations with a cosmological constant – and was stunned when he came back a few days later with the solution

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via reddit.com

M7xn8 TIL: People with severe mental illness are no more likely to engage in violent behavior than the general population, but are more likely to be the victims of violence themselves
MeY9A TIL in WWII, weather reports were censored to prevent enemy submarines from learning about conditions. A football game in Chicago was so covered in fog that the radio announcer couldn't see the field, but afterwards he was officially thanked for never using the word "fog" or mentioning the weather.
b6W1Z TIL of Snorri Thorfinnsson, an Icelander who was the first child of European descent to be born in the Americas, in the early 11th century. His parents were explorers Thorfinn Karlsefni and Gudrid Thorbjarnardóttir. He is one of the two main figures responsible for the Christianisation of Iceland.
rmPy TIL that in Chernobyl they planted hemp to remove toxins from the soil in a process that’s called “phytoremediation”
RxyQ TIL that 84% of vegetarians go back to eating meat or other animal products.