At the heart of Einstein's elegant equation, E=mc2, is the constant speed of light. Indeed, the mind-warping special theory of relativity allows time and space to bend, but light, Einstein insisted, must remain traveling at 186,000 miles per second, throughout the universe, for all observers.
"Whoa!" cries João Magueijo, a young theoretical physicist. This iconoclastic professor at the Imperial College in London has the courage, or some may say the audacity, to challenge that key component of Einstein's deeply ingrained work.
In short, Magueijo claims that some of the most complex mysteries about the origin of the universe can be solved if we consider that light may have traveled much faster at the Big Bang than it does now. In other words, the speed of light is variable.
keyboard shortcuts: V vote up article J next comment K previous comment