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Written in the Stars: NASA officer successfully defends aviation and space education doctoral dissertation

As NASA’s chief health and medical officer and a student at Oklahoma State University, Dr. J.D. Polk aims to provide the next generation with information critical to the field of spaceflight. Despite already being triple board-certified as an osteopathic doctor, an emergency medical doctor and a flight surgeon specializing in aerospace medicine, Polk decided to add another set of credentials to his title.
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