Almost 50 percent of British adults believe in captive space aliens, and topping the list of such generally-held truths is a secret plot to harbour aliens at a remote military base in a desert in the United States, says a new survey. The online poll was conducted to coincide with the UK cinema release of 'I Want to Believe', the second X-Files film, which aimed to uncover the most popular conspiracy theories. The survey uncovered that almost fifty percent of respondents believe there is some truth in the legend of Area 51, which holds that Groom Lake, in Nevada, was...