The trip had all the makings of a boring car ride—until the couple saw mysterious lights approaching from the sky.

But do alien abductions? Extraterrestrials kidnapping humans, taking them to their space ships, performing experiments on them, cutting them open, raping them, forcing women to bear hybrid babies?

Mack, of Harvard Medical School, is a long-time champion of alien abductees and a paranormal philosopher king of sorts. His 1994 bestseller, Abduction: Human Encounters With Aliens, drew international ...