John A. Knox is a meteorologist who researches clear-air turbulence (CAT) and who also received media attention for discussing ways of calculating the mathematical constant e, together with inventor Harlan J. Brothers. He is a professor at the University of Georgia and has been nationally honored for his undergraduate teaching. Early life Knox grew up in Birmingham, Alabama, where as a high-school senior at Huffman High School he was honored as a U.S. Presidential Scholar. He went to college at the University of Alabama at Birmingham (UAB). He was recruited to UAB as a member of the inaugural class of the UAB Honors Program, now the University Honors Program, and served on its Honors Council for three years. He was UAB's first national finalist in the Rhodes Scholar competition and later served as an ex officio member of the UAB Rhodes Committee, assisting UAB Rhodes candidates up to and including UAB's first winner, Neel Varshney, in 2000. As a graduating senior at UAB in 1988, Knox won both a National Science Foundation Graduate Research Fellowship and a Phi Kappa Phi Fellowship, and was a national finalist for the Omicron Delta Kappa National Leader of the Year Award. Scientific career Knox received his Ph.D. in atmospheric sciences from the University of Wisconsin-Madison. He was a post-doctoral fellow at NASA Goddard Institute for Space Studies, and taught meteorology at Valparaiso University in Indiana before moving to the University of Georgia in 2001. In 1997, inventor Harlan Brothers sent some college-level expression for e to National Public Radio's program "Science Friday". Knox's wife Pam, an intern at "Science Friday" during Knox's post-doc at NASA/GISS, told them to Knox, who confirmed them. Together, they derived several formulae to calculate e. The formulae involve applying Bernoulli's standard result that (1 + 1/n) n approximates e when n becomes large, to the formula , which is the basis of the popular bilinear transform. Since 1995 Knox has performed research on clear-air turbulence (CAT), in particular CAT forecasting. In 2008, he co-authored (with Don McCann, and Paul Williams of the University of Reading) an article in the Journal of the Atmospheric Sciences describing a new method of CAT forecasting that received international media attention. In 2010, Knox was honored by the National Weather Association with the T. Theodore Fujita Research Achievement Award for his CAT forecasting research. Knox writes popular articles and books about meteorology, including the