Kathleen L. Purvis-Roberts (Author) Kathleen Purvis-Roberts is a Professor of Chemistry at the W.M. Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges. She earned her B.S. from Westmont College and her Ph.D. from Princeton University, where she worked with Steven Bernasek. From there, she did her postdoctoral work at the National Center for Atmospheric Research in Boulder, Colorado. She joined the faculty of Claremont McKenna, Pitzer, and Scripps Colleges in 2001. She is the recipient of the Henry Dreyfus Teacher-Scholar award (2013) and the Jefferson Science Fellowship (2016–2017).Thomas G. Spiro (Author) Thomas G. Spiro is Professor of Chemistry at the University of Washington. He received the B. S. from UCLA and the Ph.D. from MIT, and did postdoctoral work in Copenhagen. He joined the faculty of Princeton University in 1963, and served as chair of the chemistry department from 1980 to 1989, relocating to the University of Washington in 2007. He is the recipient of the ICPP Eraldo Antonini Lifetime Achievment Award (2010), the ACS Award for Distinguished Service in the Advancement of Inorganic Chemistry (2004), Biophysical Society Founders Award (2004), the Wellcome Visiting Professorship in the Basic Medical Sciences, at the University of British Columbia (1999) in1999, and the Bomem-Michelson Award in Molecular Spectroscopy (1986).