The Essence of Science

As Richard Feynman explains in this 63-second video, "If it disagrees with experiment, it's wrong." This quote, by the way, doesn't do justice to Feynman's emphatic explanation, as he makes some other statements around that one that are simplify and profoundly correct. You really should watch the video.

(Tip of the cap to whoever posts on Facebook for Cornell University's official account.)