[enkid]

Well, to pick some nits, if radio waves didn't work the same way, that would be a pretty fundamental shift in physics, to the point of throwing all our assumptions out the window about our observational evidence.

[_mkef]

We're assuming they communicate the same way we would.

I'll make up something scifi like. On planet x they use short term Seismic wave to move data around. How would we on earth ever pick that up