UIC physicists highlighted for work searching for substructure inside a quark

We know protons and neutrons are made of quarks, but are quarks made of something even smaller? UIC physicists working on the CMS detector at Fermilab appear in Fermilab Today (3/16/12) for their recent work searching for substructure inside a quark. UIC physicists Professor Nikos Varelas and Dr. Lenny Apanasevich, together with UIC graduate student Inga Bucinskaite, are highlighted for their key contributions to a new paper that sets the best lower limit on possible quark substructure to 10-20 meters. So far the quarks appear to be fundamental particles with no substructure.