[Eepsy]

I’ve often wondered, if mankind hadn’t evolved sight, would the speed of light be such an important part of physics still.

[ETL]

There really isn't anything particularly special about light in this regard, other than the fact that its speed is limited to the apparent speed limit of the universe: 186,000 miles per second or "light speed". Supposedly, any massless object travels at light speed. And it's only the "speed limit" in the sense that no object with mass can be accelerated-to the speed of light, OR slowed downed to it IF already traveling faster.

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"Faster-than-light (also superluminal or FTL) communications and travel refer to the propagation of information or matter faster than the speed of light. Under the special theory of relativity, a particle (that has mass) with subluminal velocity needs infinite energy to accelerate to the speed of light, although special relativity does not forbid the existence of particles that travel faster than light at all times (see tachyons)."

http://en.wikipedia.org/wiki/Faster-than-light