mac says: I think that we are not alone in this universe, but we may as well be. Its just too big for us to ever visit another planet outside our solar system or to be visited by other critters. Rest assured, however, that they are out there buzzing around their sun, visiting their planets.
Lj3d: Or they may be looking to their skies and postulating aliens are already visiting them. I agree, the Universe is so vast, interstellar travel will not be quite like we see it portrayed on Star Trek or Star Wars. Even in those shows, the speed of light barrier has been overcome. I certainly cannot imagine why ETs would travel such vast distances and keep themselves secret upon arrival...yet drop hints such as playing in the skies, abducting a few people here and there, build pyramids and not leave a single trace of alien tecnology behind etc.
You mentioned buzzing their sun and planets. Some ETs may well be advanced enough to do this. The other possibility is that maybe there are a few species that are becoming interstellar travel capable. But they have not yet made it practical enough to go beyond maybe hundreds of light years from their parent star.
It would all change tomorrow if ET visits us in a way that can be demonstrated worldwide undeniably. Think serious continuous coverage of a landing party by CNN, Fox News etc.
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