Richard Wolfson is the Benjamin F. Wissler Professor of Physics at Middlebury College, where he also teaches environmental studies. He holds a BA in physics and philosophy from Swarthmore College, an MS in environmental studies from the University of Michigan, and a PhD in physics from Dartmouth. His research involves solar astrophysics and terrestrial climate, and he has published nearly 100 papers in the scientific literature. WolfsonтАЩs other books include several introductory physics texts, as well as Nuclear Choices: A CitizenтАЩs Guide to Nuclear Technology (1993) and Simply Einstein: Relativity Demystified (2003). He has five video courses for the Teaching CompanyтАЩs Great Courses series: EinsteinтАЩs Relativity and the Quantum Revolution: Modern Physics for Nonscientists (1999); Physics in Your Life (2004); EarthтАЩs Changing Climate (2007); Physics and Our Universe: How It All Works (2011); and Understanding Modern Electronics (2014).