Woody Allen once said: "You know there must be intelligent life in space. The question is do they have good Chinese restaurants and do they deliver?" Which is really a joke, but it is also a very profound remark. When you say do they have good Chinese restaurants, what you're really saying is, "How much are they like us?" And when you say, "Do they deliver?" you're saying, "Can they get here?" Both of which are profound questions. And at the present, we have no answers.