Three quarks for Muster Mark.
The most fundamental matter particles known are the quarks and leptons. The physical theory describing the interaction of quarks via the color force is quantum chromodynamics. Over at Quantum Diaries, a quite good blog, Dr. Tanedo has put up a nice intro to quarks (which picked up their whimsical name from James Joyce's Finnigans Wake) and quantum chromodynamics. Read the whole thing.
