Theo Colburn is senior scientist and director of the Wildlife and Contaminants project at the World Wildlife Fund. She started her career as a zoologist late in life, after she and her husband retired from a successful pharmacy business to raise sheep. She became alarmed by pollution in the Gunnison River near their ranch in Colorado. Her involvement in Western water issues led her to seek a master’s degree in ecology and a Ph.D. in zoology. Her pioneering work on the effects of synthetic chemicals on the endocrine system published in her 1996 book Our Stolen Future has led some to compare her to Rachel Carson, who warned the world about the dangers of DDT. Colborn has received many prestigious awards including the Lifetime Achievement Award from the National Council for Science and the Environment.