[dewitt]

> If there were intelligent like out there advertising it's presence, are we likely to detect it given the sheer quantity of sources?

Humans are pretty intelligent. Intelligent enough to ask that question, anyway.

So flip it around. If humans were to advertise our own presence to possible species living tens of billions of light years away, how would we go about doing it?

Sadly, even if they noticed and wrote back, our sun will have since burned out, our time in this universe long past.

[RantyDave]

I, also, have wondered this and came to the conclusion that you use whatever medium travels faster than light. Because until we discover that we're totally isolated anyway.

[realityking]

> If humans were to advertise our own presence to possible species living tens of billions of light years away, how would we go about doing it?

We‘ve been trying: https://en.m.wikipedia.org/wiki/List_of_interstellar_radio_m...