Theodore L. Brown was born October 15, 1928, in Green Bay, Wisconsin, to Lawrence A. Brown and Martha E. Brown. He earned a Bachelor of Science in Chemistry at the Illinois Institute of Technology in 1950. From 1950 to 1953, he served with the U.S. Navy. On January 6, 1951, he married Audrey Catherine Brockman. Brown then attended Michigan State University, where he worked with Max T. Rogers. He was a Du Pont Teaching Fellow, 1955-1956. He received his Ph.D. in 1956. His thesis, I. Solution Structures of Lithium Alkyl Compounds. II. Infrared Intensities of the OH Stretching Bond in Alcohols, identified two research areas that he would focus on early in his career. He joined the faculty of the University of Illinois at Urbana-Champaign, where he became an Assistant Professor of Chemistry in 1958, an Associate Professor in 1961, and a Professor in 1965. His textbook Chemistry: The Central Sciencej initially coauthored with H. E. LeMay, has been published in fourteen editions. Between 1958 and 1993, when he retired from teaching, Brown supervised 61 Ph.D. and 28 postdoctoral students. As of 1994 he became professor emeritus of chemistry at the University of Illinois. Ted Brown published extensively on alkyl lithium reagents in solution in the 1960s. His work in the 1970s includes contributions on metal carbonyl complexes, metal carbonyl radicals, molecular orbital theory, and Nuclear quadrupole resonance. He has researched and published extensively in the areas of inorganic chemistry, organometallic chemistry, chemical kinetics and mechanisms of reactions. He served as the Vice-Chancellor for Research and Dean of the Graduate College from 1980 to 1986. He is the Founding Director Emeritus of the Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, which he headed from 1987 to 1993. Brown's book Bridging divides describes the development of the institute. Brown also served as a council member of the Government-University-Industry Research Roundtable during 1989-1994. He also co-chaired a National Academies committee on Facilitating Interdisciplinary Research for the Committee on Science, Engineering and Public Policy. He served on the board of Directors of the Arnold and Mabel Beckman Foundation during 1994-2008. Brown's later work focuses on the cognitive, philosophical and social aspects of science. In 2003 he published the widely cited Making Truth: Metaphor in Science, exploring metaphorical reasoning in science. Imperfect Oracle: The Epistemic and Moral Authority of Science in Society, appeared in 2009. In 2018 he published a work of historical fiction, "The Beauty of their Dreams".