Utah State University is celebrating its centennial with a lecture series by five world-renowned scientists.

The speakers are all leaders in their fields and are known for the quality of their science and special communication skills, with specialities ranging from physics to psychology. The series will begin July 7 and continue through August 12. Each guest lecturer will present at least five lectures on a central theme.James Trefil, professor of physics at George Mason University in Fairfax, Va., will lecture on the "Origin of the Universe" July 7-8. Trefil holds a bachelor's degree in physics from the University of Illinois and bachelor's and master's degrees from Oxford University. He has published many professional papers and has written extensively about science for a general audience.

Sir Denys Wilkinson, professor emeritus of physics, University of Sussex, Sussex, England, will lecture July 11-15 on "Man's Vision of the Universe." Wilkinson is a much-honored scientist and popular speaker who has been invited to give distinguished memorial lectures by universities from Jerusalem to California. He received his doctorate degree in physics in 1961 from Oxford University and has accumulated six honorary doctorate degrees.

July 18 through July 22, Richard J. Herrnstein will lecture on "Human Variation and Its Social Consequences." Herrnstein is a psychology professor at Harvard. He has published more than 100 articles on topics such as teaching thinking skills, IQ, talent and genius. He received a bachelor's degree from the College of the City of New York in 1952 and a doctorate from Harvard.

"The Nature of Cancer and the Future of Medicine" is the topic of the August 1-5 lecture series. Theodore Puck, director of the Eleanor Roosevelt Institute for Cancer Research at the University of Colorado, will present the series. Puck has published more than 200 scientific papers and book chapters. He received his doctorate in physical chemistry from the University of Chicago in 1940.

Robert Bakker, adjunct curator of paleontology at the University of Colorado Museum, will wrap up the lecture series with his presentation, "A Bone Hunter Looks at How the World Works." Bakker received his bachelor's degree from Yale and a doctorate from Harvard. He has published articles in Science, Nature, Audubon and Evolution and has appeared in several national television productions.