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http://www.forbes.com/sites/bridaineparnell/2016/11/28/could-einstein-have-been-wrong-about-the-speed-of-light/#3c8d4ade1109
Physicists have proposed a new experiment to test their theory that Einstein was wrong about the speed of light being a constant, the foundation on which much of modern physics is based.
Professor João Magueijo from Imperial College London and Dr Niayesh Afshordi of the Perimeter Institute in Canada proposed back in the 1990s that there may have been a time right after the Big Bang when the speed of light was much faster than it is now.
If they’re right, it pokes a hole squarely in the foundation of physics for the last hundred years, Einstein’s Theory of General Relativity. According to Einstein, the speed of light is, was and always will be the same and so the laws of physics are the same everywhere.
Physicists have proposed a new experiment to test their theory that Einstein was wrong about the speed of light being a constant, the foundation on which much of modern physics is based.
Professor João Magueijo from Imperial College London and Dr Niayesh Afshordi of the Perimeter Institute in Canada proposed back in the 1990s that there may have been a time right after the Big Bang when the speed of light was much faster than it is now.
If they’re right, it pokes a hole squarely in the foundation of physics for the last hundred years, Einstein’s Theory of General Relativity. According to Einstein, the speed of light is, was and always will be the same and so the laws of physics are the same everywhere.