Destined to be one of the most hotly debated books of the year-the fascinating story of how one brilliant young physicist's heretical idea may dethrone Einstein and forever change the way we see the universe. Nothing travels faster than the speed of light, and light travels at one fixed speed. This idea is considered a foundation of modern physics, but what if it is wrong?Theoretical physicist Magueijo presents the idea that light traveled faster in the early universe than it does today. The varying speed of light theory solves some of the most intractable problems in cosmology, and could have major implications for the study of physics.