[Aric2000]

Uh, NO, you would notice, as a matter of fact, if the speed of light were not constant, you would be dead, nothing would be able to survive or function if the speed of light were not constant.

The laws of physics themselves would break down as light decelerated, atoms would not be able to hold themselves together, the molecular bonds that keeps your body together would come apart at the seams and you would cease to exist.

The speed of light is a constant, it has to be, or nothing would funtion correctly.

[DittoJed2]

Gee, wasn't aware the speed of light was God.