Measuring the conductivity of a single molecule is performed at Yale by positioning a small polymer molecule in the gap created by breaking a thin wire. Molecules of benzene-1,4-dithiol are self-assembled onto the two facing gold electrodes of a conventional mechanically controllable break junction to form a statically stable gold-sulfur-aryl-sulfur-gold system, which allows for direct observation of charge transport through the molecules. (Courtesy of Yale University.) This research is reported by Mark Reed of Yale at the meeting of the American Vacuum Society.