Some people believe that aliens - like the truth - are out there. Some believe they have already arrived, be it sucking the blood out of cows, abducting suitably fertile women, or languishing in warehouses at secret US military bases. But some people go one step further - Aliens already live among us. They look like us, sound like us, and are all but indistinguishable from the rest of the population. Unless, of course, you're in the know. So here are five of the more famous alleged aliens. #5. Orthon George Adamski was - and is - a real Marmite figure. He is also the guy who really got the whole 'contactee' movement going in the 1950s. His background involved setting up his own church - allegedly for the legal right to produce his own wine during prohibition - and then letting people assume his camp was connected to the Palomar Observatory and that he himself had earned the title of 'Professor' legitimately. In addition to a famous (and famously debu