scientists have a hard time/task as it is, proving that life lives on other planets. Aliens are a fictional human concept. We are a long way off from making contact with other life forms from other planets, if our scientists cannot even prove that life exists on other planets. One must take into account the possibility that our planet is the only one in the entire solar system that gives home to life. My only criticism is - why are scientists looking for life on/from other planets, when life is right here on earth. Surely these type of scientists are missing some kind of spiritual lesson. Imagine what the usa would do if alien aircraft started descending on the whitehouse ... it wouldn't be a friendly greeting. Which brings me to government propaganda. Aliens belong in science fiction novels/movies, not in the media as uncertified speculation, tsk. Reading a media story is like reading a dan brown novel, it blends fact and fiction to create an interesting story, while creating controversy from the stories contrasting elements.