Poll: Most believe extraterrestrial life exists – and some think it's already here

We are not alone in space – and maybe not even on Earth. At least that's what the public believes. Most Americans believe intelligent life exists on other planets, and one in five think they've already made contact with us. For those who don't think that's happened yet, many expect contact at some point in the future. If such face-to-face encounters were to take place on Earth, Americans say they would greet the alien visitors with more fascination than fear, along with some unease. …