George Hademenos, PhD, is an assistant professor at the University of Dallas, where he teaches general physics and quantum physics. He has also taught at the University of Massachusetts and at UCLA. Candice McCloskey Campbell, PhD, is an assistant professor of chemistry at Georgia Perimeter College. Shaun Murphree, PhD, is an assistant professor of chemistry at Allegheny College. Jennifer M. Warner, PhD, teaches biology at the University of North Carolina, Charlotte. Amy B. Wachholz, PhD, is the director of health psychology at UMass Medical School. Kathy A. Zahler, MS, is a widely published test-prep author.