The most exciting phrase to hear in science, the one that heralds new discoveries, is not Eureka! (I found it!) but rather, 'hmm.... that's funny...'
Source: From Charades, an internet collection of quotations
-- Isaac Asimov, (Jan 2 1920-1992), US science writer, science-fiction writer; He was a prolific non-fiction and SF author who created the robotic laws and the Foundation series.