Another cool discussion on the "Fermi Paradox" on the recent StarTalk S17E25. I.e. why haven't we found aliens!

Thought this image from The Planetary Society to be very illustrative and telling! The galaxy (and even more so the universe) is huge, and 200 light years (of radio broadcast travel) is miniscule.

Maybe we just haven't found anyone... (and no one has found us) ... yet!