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Joao Magueijo
* Author, Faster Than the Speed of Light: The Story of a Scientific Speculation (Perseus Books, 2002)
* Lecturer in Theoretical Physics, Imperial College London, U.K.

Lawrence Krauss
* Professor of physics & professor of astronomy, Case Western Reserve University, Cleveland, Ohio
* Author, Atom: An Odyssey from the Big Bang to Life on Earth...and Beyond (Little Brown and Company, 2001)

What if Einstein was wrong? What if the speed of light wasn't constant, but instead was variable? It's a bold idea, and one that might finally lead cosmologists to the long sought after "theory of everything." Host Ira Flatow and guests discuss the latest in cosmology news, including a revised estimate of the age of the universe, and evidence for dark energy.

Copyright 2003 NPR

Ira Flatow