Arthur Stewart was born in Michigan City, Indiana, spending childhood in what is now the Indiana Dunes National Park. He also spent time in Arizona, studying biology and chemistry at Northern Arizona University. Later, after serving in the Peace Corps, he earned his PhD in aquatic ecology at Michigan State University. He did postdoctoral research on the toxicity of coal oil and shale oil at Oak Ridge National Laboratory (ORNL), then learned and taught stream ecology at the University of Oklahoma before going back to ORNL as an ecotoxicologist, group leader, and senior scientist. To pursue his