Comments like yours always rest on the assumptions of our most cherished beliefs which actually are only best theories for this moment . Therefore the “Travel Time “ query is inconsequential — maybe they can bend space , create , control and use worm holes etc etc . But Who Cares , because we certainly will have no idea until we are given such info . You then forget that many otherwise sane investigators believe there is abundant evidence that we have been visited several times already . And lastly , just because we do not know why they might wish to visit us , that is irrelevant to what their unknown wishes may , or , may not be . It could even be that “they “ lived here a long time before we evolved or were created . That in itself could be reason to return —- a home visit , etc etc Less Cognitive Rigidity perhaps , and less impatience . Imho
Since we are not blessed with infinite wisdom, we don't know what it is we do know. And in fact, we lack answers to many questions about space travel. Therefore, our discussions should center around what we know to be scientific facts or at least what the scientific community believes is likely based on what we know today.
There are 3 questions that should be answered in any intelligent discussion of alien visitation.
How would they surmount the problem of distance?
From what we know of the laws of physics and accepted scientific theories, traveling as fast as the speed of light would be impossible. The energy required would become infinite as we reached that speed. Even a ship built to go a million mph, would take 671 years to to cover just 1 light year and the closest planet that might support intelligent life is 4 light years away. The distance across just our galaxy is 100,000 light years. The vast distance between the stars makes a strong argument against a alien visitation.
When would a visit occur?
The time of man on earth is only a blink of the eye in the billions of years in the life of the universe. Assuming an intelligent species overcomes the problem of the distance between the stars, the chance that they just might happen to visit us during the instant in time that intelligent life exists on earand was intelligent enough to recognize them for what they were is astronomically small.
Lastly, why would a civilization so advanced to have overcome the distance and time factor of space travel want to visit such a backward civilization as exists on Earth.
Yes, alien coming to earth make great fiction but not facts.
Maybe our laws of physics and accepted scientific theory is wrong. Maybe there are aliens that can bend space or compress space, or maybe they have developed to point of being Gods that propel themselves by their very thought, or maybe there is a parallel universe to ours that allows them to crossover, or maybe they wave a magic wand that will send them across space and time. I believe we should discuss alien visitation based scientific facts or and accepted scientific theory or at least what the scientific community considers likely.Comments like yours always rest on the assumptions of our most cherished beliefs which actually are only best theories for this moment . Therefore the “Travel Time “ query is inconsequential — maybe they can bend space , create , control and use worm holes etc etc . But Who Cares , because we certainly will have no idea until we are given such info . You then forget that many otherwise sane investigators believe there is abundant evidence that we have been visited several times already . And lastly , just because we do not know why they might wish to visit us , that is irrelevant to what their unknown wishes may , or , may not be . It could even be that “they “ lived here a long time before we evolved or were created . That in itself could be reason to return —- a home visit , etc etc Less Cognitive Rigidity perhaps , and less impatience . Imho
My comment on time was not about time travel. It's about the probability of alien life arriving at this tiny spot in all of space when there was intelligent life. Intelligent life started about a 100,000 years ago. This is only a tiny sliver of time compared to the age of universe, about 13.7,000,000,000 years ago. The time frame that alien visitors would be recognized as such is an even much smaller sliver of time. Or more to the point, the likelihood that aliens would have arrived in this particular solar system at this particular time is astronomically small.
The vastness of space, the time factor needed to travel, and fact that intelligent life capable of space travel could be offset billions of years from the existence of intelligent life on earth. This makes the likelihood of aliens visiting us extremely unlikely.