I dont think its a question if they exist or not, but if they've been here, if some of the theories of them pushing our society a little bit forward, what did they do when they were here etc. I think its almost ignorant to think that there couldnt be life outside of earth. Its also if its intelligent life, which I think theres a good chance theres intelligent life. Depends on what level of a civilization they are. If they are intelligent and advanced enough to travel space and visit other planets without effort then they probably think we're a bunch of cavemen still.
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