They might call it something els, but the laws of physics are the same.
Yes, no matter where they come from they still have to obey the same basic laws of physics as we do. And the claim that "who knows what an Alien civilization millions year ahead of us can do?" doesn't really cut it. We don't know what they can do, for sure, but we do know one thing they cannot do, and that is to break the laws of physics, which in turn also means that they have all the same barriers as we do.
I will concede that maybe they can generate a worm hole, despite the fact it would take all the energy generated by a large sun to open and maintain for any reasonable amount of time. I find it very, very doubtful, but it has not been proven to be impossible, so to option is there. And maybe there are others. But in general the theories we currently have in place describes the observable universe very well and they don't leave very many loop holes.
And Skyeagle were are you when some of your believer buddies scream - Government cover up!?
If all this, as you claim, "evidence" that was released by the government many years ago is so easy to understand and come to ONE CONCLUSION ONLY, aliens on Earth, how come that very few academics are writing papers for refereed journals about alien craft or their occupants. How come this is not thought in schools world wide!?? For after all, there could hardly be any discovery more dramatic or important than visitors from other worlds.
Confronted with this, the UFO experts usually take refuge in two possible explanations:
(1) The material that would be convincing proof has been collected and secreted away by the U.S. government. While endlessly appealing, this is an argument from ignorance (tantamount to saying “we cant show you good evidence because we havent got it), and perforce implies that every government in the world has efficiently squirreled away all alien artifacts. Unless, of course, the extraterrestrials only visit the U.S., where retrieval of material that falls to Earth is supposedly a perfected art form.
(2) Scientists have simply refused to look carefully at this phenomenon. In other words, the scientists should blame themselves for the fact that the visitation hypothesis has failed to sway them.
Which one do you prefer, or is there a third one..?
And if I may just add a quick observation. From a scientific point of view, any evidence in existence that cannot be provided for independent scrutiny is non-existent and cannot be included! And no matter how many eye witness reports are shown, they are not evidence either.