Unproven theories

Backed by years of his UFO sleuthing, Knapp said the sheer size and complexity of the subject is daunting.

"Unproven theories abound," Knapp continued. "We are pretty sure the visitors are ETs...or inter-dimensionals...or time travelers from our future...or manifestations of the collective consciousness. We also know they are benevolent guardians, evil reptilians, harvesters of souls or genetic materials, angels from heaven, demons from hell, or maybe androids dispatched by incomprehensible super-beings. It's a proven fact that they are here to help us, teach us, or eat us, or mate with us, or mess with our heads, or save their own species while they carve up our livestock, doodle in our wheat fields, and befuddle our most sophisticated technology."

Are UFOs driven by teenage pranksters on a joyride through the cosmos, Knapp questioned, or perhaps anthropologists from a parallel universe, modern manifestations of pixies and leprechauns, or pragmatic politicians from Serpo--a planet of Zeta Reticuli--who have cut a deal to trade advanced technology for the unfettered opportunity to abduct and traumatize certain unfortunate bloodlines?