6/12 public lecture today by Nobelist David Gross at University of California, Santa Barbara: What's a fundamental theory of physics? http://www.fnal.gov/culture/NewArts/Lectures/11-12/gross.shtml Dr. David Gross received the Nobel Prize in Physics in 2004, along with H. David Politzer and Frank Wilczek. Frank Wilczek is quoted as saying: "Let's see what goes into it (the proton under QCD theory), massless gluons, and massless up and down quarks, and nothing else. You have to agree that that's an explaination of the origin of mass." Is this quote still considered valid by people today?