Given the huge number of galaxies in the universe, that we know of, and given the huge number of solar systems in them, it's almost inevitable that there are other sentient life forms out there.
But...the distances between stars are so large that only a tiny proportion of those sentient life forms are likely to have the technology necessary to travel the huge distances.
I don't doubt that people have seen things in the sky, but I do doubt that they were extraterrestrial craft.
But...the distances between stars are so large that only a tiny proportion of those sentient life forms are likely to have the technology necessary to travel the huge distances.
I don't doubt that people have seen things in the sky, but I do doubt that they were extraterrestrial craft.