Well, I don't know a lot about those things. But...I do believe there are a ton of things that we have yet to discover about the entire world around us! We've only mapped maybe 10% of the oceans floors! So how the hell can we know what going on in places that we've never been, more specifically, like outer space???
EDIT: Personally, I think there are way too many "IF's" being thrown around and not enough concrete evidence. The jury will be out for a VERY long extended vacation, imo. LOL