RE: They\'ve been here all along...
OK, I believe the original question was whether UFO's were from, basically, other planets or other time frames. The answer is difficult because evidence seems to support both sides. For Time Travelers FROM the Future: 1.)Many UFO reports that end with the object "disappearing" that is, not just moving away at a high rate but flat-out vanishing. 2.)No one, out of all the abductee reports, can seem to get their hands upon a piece of solid evidence. If I were a time traveler FROM the future and accidentally left something behind during one history recon trip, I sure would zip right back and undo my goof. 3.)UFOs have been reported not just since Kenneth Arnold's time, but thru ALL time. And the models are bacically the same: cigar-shaped or disks. Lately, there seems to be a rash of triangles, but I think that is just us trying to come up with our own flying saucer. So the stability of models over time is patently absurd. No major improvements? No revolutionary shapes? Can't get any better than this?? 4.)Their occupants basically resemble our basic, human structure: one head, two eyes, one nose, mouth, two ears or ear holes, two arms, two legs, hands and feet. Plus, they seem to be adaptable to our planet's atmosphere. The Greys could be us at an incredible future time. Or genetically reengineered homo sapiens. Supporting arguments for They Come FROM Other Planets: 1.)If their ships do bend gravity and light, that would tend to render them a degree of invisibility and would also accountg for "disappearing" reports. 2.)Many reports of UFOs in space. 3.) ...?
Personally, I tend to favor the Time Traveler because 1.)What would tip-off extra-galactic beings to our presence? Enough to want to make them come here? 2.)We are already here,and if in the future, we have developed a time machine, then we are just checking ourselves out. Maybe something tragic has happened to us in the far, distant future and we're just trying to figure out a way to undo it thru the past time.