The barrier of light speed is a human thing. Infinite speed doesn`t mean time travel.

We are humans. Also arrogants by the absurdities that our "human science" claims, but we are bounded to our senses and the perceptions that come from them. Also we are bounded by the things we "believe" that makes the universe, bottom up.

We "see", directly (visible light) or indirectly (the rest of the electromagnetic spectrum) things that are "painted" by EM waves, wich moves at a limit of 0.33 nanoseconds/meter.

Our eyes, and our EM based measurement equipment, are used to see or register events that carry information at not more than 0.33 ns/meter.

Between 1850 and 1905, we "humans" started to postulate that nothing could move faster than light and, later, that only photons (EM occurrences) could travel at such speed in vacuum.

So, to "prevent" that such a thing could be registered by us, humans", we postulated (as a principle, really) that "c" was the upper limit. Two persons, between 1894 and 1904, designed and perfected a group of transforms (Lorentz, Poincarè) that prevented events at higher speed. They created the post-Galilean relativity, from wich Einstein profited greatly, specially thanks to his former teacher Minkowski and his space-time 4D tensor, wich embedded "ct" as a fourth dimension, a temporal one. And then, massive indoctrination happened for 110 years, with their consequences.

But, as humans, we only perceive things through EM waves, directly or indirectly. If we watch a movement of a person, 100 meters far away, we perceive it because we use light reflection. Visible light illuminate that person, and his/her movements are perceived by us 33.3333... nanoseconds after.

So, no law of physics is violated. But IF we had another sense that could SEE ANOTHER type of radiation (undiscovered yet) that makes 0.1 nanoseconds/meter, we would perceive the motion 100 meters far away only 10 nanoseconds after.

As if, by any chance, instantaneous speed of this undetectable energy happens, we would see the motion of this person 0.000 nanoseconds after his move.

Now, suppose that alien beings, with senses very different from ours, come to earth and use "xadron" instead of light, being the speed of such "xadron" beams 100 times the speed of light.

When they paint us with their "xadron" beams and collect their information, 200 meters would have been used for this "visualization", and they would perceive our motion just 0.666... nanoseconds after we moved.

In no time, supraluminal speed means time travelling.

Even with infinite speed, the "visualization" of our motion would be instantaneous. At no case they would observe our motion BEFORE we start to make it.

Finally, probably those aliens have their own theory of relativity, with "xadron" speed as an upper limit.

Then, if there is something else that EM Waves to "observe" things, CAN YOU SWEAR that such a thing doesn't exist, just because we CAN'T PERCEIVE nor UNDERSTAND IT?

Maybe a cat can perceive things with speed faster than light. Can you prove that I'm wrong?

If not a cat, any other specie of the wide offering of 8 million living species at Earth right now, 9000 of them being mammals.

This thread is just food for thoughts.