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TIL The gravity constant, G was not known in Newton’s time, meaning the masses of the planets could not be directly computed. Newton got around this issue by expressing the masses of planets in terms of the mass of the sun

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BnMD TIL after writing ‘The Show Must Go On’, Brian May said to Freddie Mercury “Fred, I don’t know if this is going to be possible to sing”, due his illness at the time. In response, Mercury took a shot of vodka and said “I’ll fucking do it, darling!” and recorded the song in one take.
1axVV TIL that polar bears and penguins live on opposite ends of the planet, and likely never have ever met.
kOmmE TIL that the first novel featuring time travel was written in 1733. It is set 1997 and tells of a future where the world becomes dominated by the Jesuits. Because it was written before the industrial revolution, there is no depicted technological advancement between the author's time and the future
VM0xQ TIL when Richard Feynman was in the State Curriculum Commission of California, he found out that some members of the committee which was responsible for choosing which books are used in public education had given a rating to not only unfinished, but completely blank textbooks [Page 173]
6EQZY TIL that one of the cities which is hosting the 2022 FIFA World Cup in Qatar isn't even built yet.