Watching a Science Channel show on the universe, and a physicist just remarked how much our understanding of the universe is changing. Yet every step along the way our damn-sure scientists have told us they are certain how the world works. C'mon Pete, stop dreaming that everything they tell you is truth.

ETA: Oh, and just delivered in a cute Brit accent in an ad for an upcoming show about Space: "We've been looking at things completely wrong until now".