The Interdimensional vs ET Hypothesis, Virtual Experiences and UFO Sightings as “thought forms” Legendary researchers John Keel and Dr. Jacques Vallee have put forward an “interdimensional” explanation that challenges the ET hypothesis for UFOs. In this blog I discuss some of the parameters of this debate. John Alva Keel, (March 25, 1930 – July 3, 2009) was an influential American journalist and popular ufologist. He is the author of “Operation Trojan Horse” (1970) and “The Mothman Prophecies...