Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. L. Stephen Coles is the co-founder and the Executive Director of the Gerontology Research Group,; a Visiting Scholar in the computer science department at the University of California, Los Angeles, United States.; and an Assistant Researcher in the Department of Surgery, at the UCLA David Geffen School of Medicine, in Los Angeles, California. He is a researcher and a spokesperson on supercentenarians and on aging.