I think it depends on what "someday" means to you. Within our lifetimes? Almost certainly not. Within 100 generations? Still, probably not. But "eventually"? I

I think it depends on what "someday" means to you. Within our lifetimes? Almost certainly not. Within 100 generations? Still, probably not. But "eventually"? I could see that being likely, if: * humanity doesn't extinguish it's own flame * there isn't some freak, inescapable, immitigable cosmic occurrence before we've gotten out of our own solar system * we develop technology for near-lightspeed or FTL travel If the above were true, I think the only thing that would stop us from finding non-Earth-origin life some time before the heat death of the universe would be if there is actually no other life out there, which I think is unlikely. However... I do think that there's basically 0.0% chance of finding extraterrestrial life in the deserts of Earth, excepting in the case that the spontaneous generation of simple life is exceedingly common. But, I guess determining how common that might be is one of the goals of the search.