There are aliens out there.
Implication of aliens similar to human life form and all may be out of the question. Or not, depending on the many planets we have found within the safe zone for "life form" inducing enough heat and not quite too far out to be too cold.
Just think of it this way, in the gas giant planets in our own system, there could be technical gaseous form alien bodies in or around the exterior of the planet itself. Or even liquid form alien bodies. In galaxies farther away on the planets which simulate the inherent distance from its own star to claim life forms which may evolve into humanoid or beastial or other type life forms may exist, we just do not have the proper technologies to either scope out the lands, or gaseous forms, and including maybe life forms in another instance could be in essence be embodied as such that our own eyes may not see, but their form may be in what we claim to be as voices or sound waves. If we can get technological advanced enough to venture into these many prospects, we could definitely have other life forms on this planet already, we just cannot determine through our own capacity.
Kate <3