The World's 20 Greatest Unsolved Problems. This item is unavailable.The World's 20 Greatest Unsolved Problems

Not here are such questions as how to find world peace, the relative influence of nature and nurture, or why a few people are so filthy rich while so many are dirt poor. Rather Vacca, an information technology consultant with a background at the US National Aeronautics and Space Administration, looks at current debates in astronomy and cosmology, physics and astrophysics, biology and paleontology, neuroscience, geology, chemistry, and energy. Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)

John Vacca is an information technology consultant and internationally known best-selling author based in Pomeroy, Ohio. Since 1982, John has authored 42 books and more than 550 articles. John has a rich background in technology and science as a former configuration management specialist, computer specialist, and the computer security official (CSO) for NASA's space station program (Freedom) and the International Space Station Program, from 1988 until his early retirement from NASA in 1995. John was also one of the security consultants for the MGM movie titled : "AntiTrust," which was released on January 12, 2001. In addition to his many writing projects, John is also a freelance editorial reviewer for online retailers.