Running contrary to the claims of those who believe that UFO sightings only date back to the 1940s, some theoreticians insist that extraterrestrials have existed among us for millennia - an idea allegedly underscored by a substantial amount of historical data. Witness, for example, the bizarre carvings on prehistoric sites that depict aliens - evidence that strikes many as not only convincing but definitive. As hosted by UFO authority Kenneth Arnold (author of the tome -Fingerprints of the Gods), the History Channel documentary In Search of History: Ancient Aliens investigates these claims once and for all - touching on such subtopics as the universal design of skyscrapers around the world and the references to flying objects in countless ancient manuscripts and suggesting that humans may not be alone in the universe.

In Search of History: Ancient Aliens
1. Scientific Skepticism [4:00]
2. Earliest Encounters in Egypt [6:03]
3. Book of Genesis [10:02]
4. Sites Around the World [7:28]
5. Ageless Land of Asia [6:06]
6. Making Contact [6:06]