Comment on Is The Speed of Light Everywhere the Same?parentComments−alphydan12yThere is plenty of evidence, but it would require to change some of our cosmological models (so it's not without controversy). A physicist that has explored the issue in detail is Joao Magueijo:https://en.wikipedia.org/wiki/Jo%C3%A3o_MagueijoFor a good review of the VSL Theories (Varying Speed of Light Theories) and the evidence behind them see http://arxiv.org/abs/astro-ph/0305457−sampo12yThere is plenty of evidenceAccording to your second link: "The evidence is currently slim".
Comments
There is plenty of evidence, but it would require to change some of our cosmological models (so it's not without controversy). A physicist that has explored the issue in detail is Joao Magueijo:
https://en.wikipedia.org/wiki/Jo%C3%A3o_Magueijo
For a good review of the VSL Theories (Varying Speed of Light Theories) and the evidence behind them see http://arxiv.org/abs/astro-ph/0305457
According to your second link: "The evidence is currently slim".