Bill Clinton has revealed that he believes in the existence of aliens.
The former US president said on 'Jimmy Kimmel Live' that it was likely that we are not alone in the universe, as we live in an ever-expanding universe, News.com.au reported.
Clinton added that the last two years more than 20 planets have been identified outside our solar system that seem to be far enough away from their suns, which might be able to support some form of life.