Has anyone ever thought of the idea that aliens are evolved humans from another planet?

That sounds like a good possibility. Reminds me of the end of War of the Worlds with the bacteria. (don't wanna ruin it, so I would say specifically). Anyways, they're probably adjusted to their own environment and that's why they look they way they are (whatever that look may be, it's been distorted through movies and everything). I remember reading someone suggested UFOs are time travelers. They might be a bit more out there. however, aliens from another planet would be more believable to me. The mentality of aliens could just be way beyond human comprehension, so it would be hard to figure out their possible existence anyways.