Read the latest update. Yes I will defer to the experts, but in my gut I have never bought into the idea that the speed of light should be constant for all space and time. Maybe I am simply too used to economic models, where all the measured magnitudes fluctuate over time. That being said, a faster speed of light in previous times might, among other things, explain why the universe appears to be so uniform. Here is a collection of relevant stories and links.
The speed of light, one of the most sacrosanct of the universal physical constants, may have been lower as recently as two billion years ago – and not in some far corner of the universe, but right here on Earth.
Do we economists sound that funny to outsiders?