Superficially, this appears to be an excellent opportunity to use dogs to learn about diseases that affect humans and drugs that are taken by humans. Unfortunately, many ideas that appear reasonable upon superficial examination fail miserably in reality, writes Ray Greek MD. More important scientifically than cohabitating for thousands of years is the fact that humans and dogs last shared a common ancestor around 100 million years ago. About the Author Ray Greek received his MD from the University of Alabama at Birmingham in 1985 and completed a residency in anesthesiology in 1989 at the University of Wisconsin. He has taught at the medical schools of the University of Wisconsin and Thomas Jefferson University in Philadelphia. He has performed research with animals and humans. He is the president and co-founder of Americans and Europeans For Medical Advancement (AFMA/EFMA). Along with his wife, Jean Greek DVM, he rescues animals and currently has two very sweet pit bulls. AFMA/EFMA illustrates the scientific evidence at For Life On Earth (FLOE). ClickHere ToRead TheRestOf ThisArticle