“Extraordinary claims require extraordinary evidence”
Carl Sagan, Cosmos, Ep. 12
We’ve seen this quote a lot in recent days, thanks to the “speeding neutrino” report. It is a favorite phrase whenever a spectacular new finding generates intense skepticism. Carl Sagan famously invoked it in his TV series Cosmos, when discussing the possibility that the Earth might have been visited by intelligent aliens. The phrase has a nice ring to it. But… Does it make sense?
I hesitate to question the man who also popularized the phrase “pale blue