If aliens do exist, theoretical physicist Dr. Michio Kaku posits, why would they want anything to do with us? It would be like a hunter talking to a squirrel, he suggests, and he has a great point. Hollywood and science fiction novels have conditioned us for years to believe that aliens either want to hang out on our intellectual level and learn from us... or destroy us. If alien life really does have the technology and know-how to make it all the way here, perhaps we should just play it cool an