[gabereiser]

I have come to the same conclusion. More than likely we’ll know about other civilizations not from radio waves but from either a celestial event they have created or by them visiting us (and letting us know).

Searching for radio waves is like digging for celestial dinosaurs without a shovel. Just hoping there’s a fossil on the top soil.

[jamiek88]

And worth doing because sometimes we get very lucky and stumble upon such surface fossils.

[gabereiser]

Sure, but usually you have to dig, even with surface fossils.