Dr. Geoffrey Simmons has studied the human body and evolutionary theory for more than 40 years. He received his M.D. in 1969 and now practices medicine in Oregon. In 2006 he became a senior fellow of the Discovery Institute. A director of Physicians and Surgeons for Scientific Integrity, Dr. Simmons has authored nine books, including What Darwin Didn't Know and Billions of Missing Links.

Dr. Geoffrey Simmons has studied the human body and evolutionary theory for more than 40 years. He received his M.D. in 1969 and now practices medicine in Oregon. In 2006 he became a senior fellow of the Discovery Institute. A director of Physicians and Surgeons for Scientific Integrity, Dr. Simmons has authored nine books, including What Darwin Didn't Know and Billions of Missing Links.