There are gaps that with our modern exposure to information, is likely to be filled with 'alternatives'. Its fascinating that they can make it as if its real. But looking deeper with an open mind, one can see the truth not far from the surface.

E.g. The Roswell incident werent revived until the 70s i think. And after 30 yrs being fed with pop imagery of flying saucers, unlikely witnesses came forward.

To make things more mysterious with conspiracies, most gaps are only filled with just that, when actual explaination is actually just that - unexplained.

So does Occam's Razor. Simplest explaination is always the best. Yes theorists always label something unexplainable as paranormal or extraterrestrial.

Its a fallacy. U said its unexplained yet in the same breath provides explaination.