Arthur Stewart is a scientist, science educator, essayist and poet. He graduated from Agua Fria Union High School and Northern Arizona University (B.S. and M.S. degrees) before spending two years as a Peace Corps Volunteer in Ghana.

Upon returning to the U.S., he completed a Ph.D. in limnology at Michigan State University and was a Postdoctoral Fellow at the Department of Energy's Oak Ridge National Laboratory, in Oak Ridge, Tennessee. He then conducted stream-ecology studies at the University of Oklahoma for three years before returning to ORNL, where he served as an aquatic ecologist and ecotoxicologist, group leader, Science Leader and Senior Scientist.

He has authored or co-authored numerous technical articles and book chapters, and has served as editor or associate editor for Environmental Toxicology and Chemistry, Journal of the North American Benthological Society, and Ecotoxicology. He presently works for Oak Ridge Associated Universities as a science education project manager, and lives in Lenoir City.

Circle, Turtle, Ashes, published by Celtic Cat Publishing, is his third book of poetry.