the government has all kinds of things like patches people found that show the they know about aliens, and why would only humans be the only living thing thats just some dumb Religious thing, there is definatly aliens just go study it and youll find signs all around, espicialy Government things, google "Government alien patches" osomething like that its really cool to see, believe what you want but iam certian there are Aliens, besides those crop circles would take more then a night