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Cosmic Inflation and the Accelerating Universe -- Alan H. Guth

(Editor's note: In January 1998, researchers announced a discovery that was surprising to many--that the expansion of the universe is not slowing down but, in fact, is accelerating. The journal Science named the discovery the Breakthrough of the Year for 1998. In this distinguished lecture from Oct. 20, 2003, Dr. Guth talks about the accelerating expansion of the universe.)

Dr. Guth describes the theory of inflation and presents evidence that indicates our universe very likely underwent a perod of exponential doubling in size in its early existence. He also discusses the surprising observation that the enormous expansion of the universe is accelerating, offers possible explanations for this acceleration, and describes its impact on particle physics.

In addition to receiving many distinguished academic awards, Guth has been called one of "The 25 Top American Innovators" by Newsweek and Science Digest has ranked him among the "100 Brightest Scientists Under 40."

Credit: NSF

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