I was a true believer in my youth. Now that I'm pushing 50, not so much.
I believe the chances are very good that there is intelligent life in the universe, and some are possibly much more technologically advance. They might even have mastered interstellar travel. We know that the standard model of particle physics is not telling us the whole story about what is going on in the universe. This is especially true when it comes to gravity. A species that has mastered this knowledge might has the universe at their finger tips. We just don't know.
I just don't see it as being very likely that they've been here. If you have the universe at you fingertips, there is an awful lot of interesting places to go.
I believe the chances are very good that there is intelligent life in the universe, and some are possibly much more technologically advance. They might even have mastered interstellar travel. We know that the standard model of particle physics is not telling us the whole story about what is going on in the universe. This is especially true when it comes to gravity. A species that has mastered this knowledge might has the universe at their finger tips. We just don't know.
I just don't see it as being very likely that they've been here. If you have the universe at you fingertips, there is an awful lot of interesting places to go.
“Understanding is a three edged sword: your side, their side, and the truth.”