More fascinating science reported in the Cleveland Reader says that the speed of light in space may be variable. It seems the speed of light can be affected and that some computations should be revised to include the speed of light as variable and not a constant in real space.
Since the first recorded attempt to measure the speed of light by Galileo there have been many discoveries refining, defining and quantifying the speed of light. If you are interested enough to read the Cleveland Reader article, dig a little deeper around the internet. Sometimes in school science didn’t seem as interesting to me as it should have.