J. David ArchibaldJ. David Archibald is an emeritus professor of biology, teaching at Yale University and San Diego State University. He led over 30 paleontological expeditions in the U. S. and central Asia. He is the author of almost 200 articles and author or co-edior of eight books, the most recent in 2017 Origins of Darwin's Evolution: Solving the Species Puzzle Through Time and Place. Read More Read Less