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Can Alzheimer's disease be prevented? UCLA Longevity Center director Dr

When Petra Cahill’s parents married in 1962, the pill was not yet legal, college tuition was a three-figure cost and most women didn't work outside the home.

When Petra Cahill’s parents married in 1962, the pill was not yet legal, college tuition was a three-figure cost and most women didn't work outside the home. She set out to learn how they stayed together in the face of a culture that has changed radically.

Steven Austad , of the Barshop Institute for Longevity and Aging Studies, at the University of Texas Health Science Center at San Antonio, has applied the longevity quotient--which he developed--to many species, including those depicted here.

Steven Austad , of the Barshop Institute for Longevity and Aging Studies, at the University of Texas Health Science Center at San Antonio, has applied the longevity quotient--which he developed--to many species, including those depicted here.

Cities get faster and more productive as they get bigger and last forever. Companies get slower and more boring, and then they go out of business. Can companies change that model?

Editor's Note: The following blog post first appeared May 19 on the World Science Festival's Web site. Most people look for the key to postponing old age in mega-antioxidant-loaded juices, extreme exercise regimens, or expensive skin creams