UFOs and deja vu

When all is said and done there is ample evidence that certain aspects of the UFO phenomenon are largely repeatable - that they happen over and over again, making it a mixed cocktail of deja vu. It is a situation that is so bizarre yet prevalent that it deserves serious study. Such a study is now at hand, and it's an in-depth one that proves there are certain "coincidental" aspects of the phenomenon that cannot be overlooked.

Are UFOs just a matter of nuts-and-bolts ships from another galaxy? Travelers of the universe who accidentally stumbled on to Earth and decided to make a mysterious, secretive kind of contact with our small planet's inhabitants? Can we sum up the flying saucers as an invasion continually poised to happen - but that never quite manifests itself in real world terms that no one can deny?

https://www.unexplained-mysteries.com/column.php?id=334441