Geoffrey Simmons is a medical doctor and author of ten books, including What Darwin Didn’t Know, Billions of Missing Links, and Are We Here to Re-Create Ourselves? He has a BS in biology from the University of Illinois and received an M.D. from the University of Illinois Medical School. He was a doctor of internal medicine for the PeaceHealth Medical Group in Eugene, boarded in internal medicine and disaster medicine. He has lectured across the US, in Spain and in Israel.