There is a lot actually. Even you may as well be a martian.
Then you must realize the vast amount of planets and moons fit to harbour living organisms, and that's just life as we know it. We don't really know the possibilities of more exotic chemical structures that could thrive in more extreme environments.
We are completely blind to what's out there. Distant planets are measured by the amount of dimming they do to the stars they orbit. We didn't even know the true colour and topography of Pluto until very recently. There is so much we don't know about the universe and to think otherwise is just wishful thinking.