I’ve long thought that many UFO or strange light sightings are of natural, earthly origin, if still quite mysterious in their scientific nature. British author Paul Devereaux wrote an insightful book on the matter in 1989 called “Earth Lights Revelation” that links these sightings with fault lines. It is almost certainly what causes things like the mysterious Marfa Lights in West Texas (which I’ve witnessed) and ball lightning. Surely, many standard UFO “bright ball of light” type sightings fall into this category as well. Some new articles with photos about this phenomenon have just been published, including the one linked above. I love the photo showing several such ball lights “floating” above the ground and presumably emergent from a local fault line there.
That said, there are also many sightings and encounters of other phenomena that go far beyond these lights, and which I believe originate in some form of ‘parallel dimension’. This alternate dimension can be accessed, if only with great discomfort and hard effort, through the ritual shamanic use of entheogens like Ayahuasca and Peyote. Graham Hancock’s book, Supernatural, is a great introduction to this concept.
All such adventures are subjective experiences, of course, (at least for now) but there is a large consistency across all such human reports. I offer my own report of such a powerful experience in my series on Ayahuasca, linked in the sticky post at the top of my Home page (or here).