Aliens likely aren't visiting Earth, but scientists believe they're out there. Here's how they're searching for intelligent life. Doyle Rice and Grace Hauck, USA TODAY Congress-sanctioned UFO report to detail unexplainable 'sightings all over the world' Replay Video UP NEXT More than 60 years ago, scientist Enrico Fermi was sitting at lunch in Los Alamos laughing at recent reports of flying saucers and discussing the odds of intelligent alien life when he posed a now-famous query. "But where is everybody?" he asked three other nuclear physicists, according to accounts of the luncheon. Amid a resurgence of interest around the topic in anticipation of a U.S. intelligence report on "unidentified aerial phenomena," many people are asking the same question – and wondering if they're already here.