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TIL Scientist John All fell into a 70-foot deep crevasse in Nepal. He broke 15 bones and was bleeding internally but miraculously survived and was able to document his climb out.

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W1DL TIL that two of Saturn’s moons, Janus and Epimetheus, only have an orbital altitude difference of 50km. Due to this, one moon will ‘catch up’ to the other every four years, and they will begin a 100 day process in which they exchange orbital positions.
4X5wX TIL the Adoration Of The Magi is an unfinished work by Leonardo da Vinci commissioned by a Florentine monastery in 1480. Consistent with his proneness to abandon projects, he eventually grew bored with it, simply left, and moved to Milan. The monastery paid Filippino Lippi to complete it instead.
7Z1O TIL lobsters literally engage in pissing contests. Dueling lobsters urinate out of their face during fights and the lobster who pees first almost always wins.
egjD TIL that Buzz Aldrin punched a moon conspiracy theorist in the face.
5V1xQ TIL that Quasar 3C 273 is so bright that if it were only 33 light years away, it would outshine the Sun in Earth's sky. 3C 273 is 4 trillion times brighter and 886 million times more massive than the Sun.