How Kepler Invented Science Fiction and Defended His Mother in a Witchcraft Trial While Revolutionizing Our Understanding of the Universe. Maria Popova (@brainpicker) is simply amazing. Her prose is worth reading for its beauty alone (keep in mind that English is not Maria’s native language!), and the stories in this essay highlight just how brilliant, stupid, ignorant, and insightful humans can be… sometimes all at the same time. Hat tip to JZ for the recommendation.