> and share so many common aspects between them For each original/exciting/intriguing story, whether it arose from a dream, hallucination, psychological trauma

> and share so many common aspects between them For each original/exciting/intriguing story, whether it arose from a dream, hallucination, psychological trauma, deliberate invention, misinterpretation of natural (or artificial) phenomena, or whatever, there are hundreds of copycats as people (consciously or not) seek their own moment of fame. Of course they share lots of common aspects. > They're here, and have been visiting us for hundreds of thousands of years You can believe that if you like, of course, but I don't see a shred of credible evidence to support it.