How could "they" find us...!!?? Lets set aside the question of whether advanced galactic societies would have the slightest interest in our wars, WMD, our pollution problems, our reproductive systems or our cows butts. The real question is, how would they know about us at all? There is only one way that they can tell from interstellar distance that intelligent creatures inhabit this planet....RADIO. Our radio signals travel at the speed of light, and this means that even with infinitely fast spacecraft, the aliens cant be much farther off than 15 light-years to have reached our lovely planet by 1947,(Rosswell). The number of star systems within 15 light-years is about three dozen. There would have to be 10 billion technically sophisticated societies in the Galaxy to have a reasonable chance of finding one camped out among the nearest three dozen stars. Thats optimism of a high level indeed. What about warp drive...? Lightspeed...? Maybe the aliens can create wormholes and get here in essentially no time....? It doesnt matter. Ill worry about how they got here once Im convinced that theyve really made the scene. To get here they need to know were we are. Approximately half the U.S. population suspects that extraterrestrials have come to our planet. This is such a controversial (and emotional) topic that its mere mention guarantees a storm of Web chat and high-voltage PMs. In the end, of course, the matter of alien visitation will be decided by the evidence, not by the intensity of opinion. While I certainly expect that the Galaxy is home to many advanced societies, the quality of the evidence has so far failed to convince me that any of them have emissaries on our planet. PS:... I would find myself extremely self centric if I said that there are no other intelligent civilizations out there... I am convinced there are many. But I highly doubt that any of them happened to be so close that they have discovered us in our little, private corner of the galaxy.