"Extraordinary claims..." who said that? "Extraordinary claims require extraordinary evidence." Obviously, Carl popularized it, but is he the one who coined it? I just read in my book "Escape from Hell"*, that it was Descartes who first said this. True? *(Carl is in Dante's Eighth Circle of Hell (along with Diviners and Fortune Tellers) for being a false prophet. He started teaching science but then it got way from him and he started making predictions about Earth's demise in a Great Ice Age).