Dianne Hales is one of the country's most widely published authors of books & articles on health subjects. Her husband, Robert E. Hales, M.D., is a nationally renowned psychiatrist. He is professor & chair of the Department of Psychiatry at the University of California, Davis, & the author of more than 125 scientific publications. Together, they are also the co-authors of the definitive, award-winning reference work "Caring for the Mind: The Comprehensive Guide to Mental Health."Michael A. Seeds has been Professor of Physics and Astronomy at Franklin and Marshall (F&M) College in Lancaster, Pennsylvania, since 1970. In 1989, he received F&M College's Lindback Award for Distinguished Teaching. Seeds' love for the history of astronomy led him to create upper-level courses on Archaeoastronomy and Changing Concepts of the Universe. His research interests focus on variable stars and the automation of astronomical telescopes. Mike is coauthor with Dana Backman and Michele Montgomery of HORIZONS HYBRID: EXPLORING THE UNIVERSE, Thirteenth Edition, and UNIVERSE HYBRID: SOLAR SYSTEM, STARS AND GALAXIES, Eighth Edition, both published by Cengage Learning. He was Senior Consultant in the creation of the twenty-six-episode telecourse accompanying the book HORIZONS: EXPLORING THE UNIVERSE, Twelfth Edition.