The Fermi Paradox tells us that even though we do not have evidence other life exists outside our own, we are the living evidence that life could exist in our universe, so the possibility of aliens existing in our expansive universe is enormous.
We are detecting organic compounds on other worlds at this point, which isn’t quite evidence of life, but al least evidence of the processes that made for abiogenesis here here on earth.
As for advanced civilizations, yeah we need to colonize other worlds, ourselves before assuming civilizations can advance enough to escape their own homes or probe other stars. Threats of nuclear war and ecological collapse are still great filters we’ve yet to pass, ourselves.
The Fermi Paradox tells us that even though we do not have evidence other life exists outside our own, we are the living evidence that life could exist in our universe, so the possibility of aliens existing in our expansive universe is enormous.
We are detecting organic compounds on other worlds at this point, which isn’t quite evidence of life, but al least evidence of the processes that made for abiogenesis here here on earth.
As for advanced civilizations, yeah we need to colonize other worlds, ourselves before assuming civilizations can advance enough to escape their own homes or probe other stars. Threats of nuclear war and ecological collapse are still great filters we’ve yet to pass, ourselves.