Originally Posted by Dale Kemp

If a space fairing species was to approach a distant planet (Earth) they would study it with telescopes and radio telescopes first, then send a probe. Along the way, they'd surely discover intelligent life here. So they'd contact us remotely, to parley peace before visiting. At least if they were able to perceive us as intelligent life.


And we have been searching for such a signal for decades, and haven't found one yet.