The argument about whether or not aliens are real is a very old one. Many people are skeptical because they have seen no evidence of any kind of life in the universe except for our own. But recently scientists made a discovery that could change that theory. They discovered microorganisms in the frozen debris of a comet that share a lot of similarities with microorganisms that have evolved on Earth. You can find out more about whether it is true or not that aliens are real by looking here: http://www.foxnews.com/scitech/2011/03/05/exclusive-nasa-scientists-claims-evidence-alien-life-meteorite/.