Why have we ruled out the possibility of finding something faster when we’ve only scratched the surface of space exploration and understanding?
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It’s not just about “light”. Light is just a tiny fraction of the electromagnetic (EM) spectrum that we can see. This includes radio waves all the way up to X-rays and gamma rays.
The speed of light( “C” for short) is actually the speed of *Causality*. The speed of cause and effect.
If something does not have mass (and is not currently interacting with something) it moves *at* C. That’s not just the maximum speed that it can travel that is the speed that it *does* travel.
Why/How?
The “how” is described by insanely complex mathematics.
I think the why has to do with the “Anthropic Principle”. Without a maximum speed limit, the history of the universe would go from start to finish instantaneously. Nothing can be observed in the universe if we don’t have time to observe it.
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