Franklin M. Harold was born in Germany, grew up in the Middle East, and became a scientist at the City College of New York and the University of California, Berkeley. His professional career spans forty years of research and teaching, mostly in Colorado. He is professor emeritus of biochemistry at Colorado State University and affiliate professor of microbiology at the University of Washington. Harold's interests include the physiology, energetics, and morphogenesis of microorganisms, with a continuing interest in evolution. He is a member of the American Academy of Microbiology. Harold is also the author of The Vital Force: A Study of Bioenergetics and The Way of the Cell: Molecules, Organisms, and the Order of Life.