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Dr. Denham Harman, pioneer of research on aging, dies at 98
Dr. Denham Harman, pioneer of research on aging, dies at 98

Dr. Denham Harman, a renowned scientist who developed a prominent theory on aging that's now used to study cancer, Alzheimer's disease and other illnesses, has died in Nebraska. He was 98. Harman, who worked into his mid-90s at the University of Nebraska Medical Center, died Tuesday after a brief illness at a hospital in Omaha, medical center spokesman Tom O'Connor said. Harman developed the "Free Radical Theory of Aging" in 1954, though it took years for additional research to prove its importance. The theory holds that one of the byproducts of oxygen utilization is adverse chemical reactions in cells, which result in aging and, ultimately, death. The...

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