I believe this gullibility in believing that the old world had influence in the new world must be a psychiatric disorder. I posit that Americans are envious of the old world where you can't throw a stone without hitting a major archaeological site. When the Egyptians were fascinating the world, magically Egyptian like artifacts started turning up in the US, most of which were inconsistent and outright forgeries. Same for the Vikings. This show is falling right into that paradigm. The host outrightly disbelieves experts who disagree with his hypothesis. One expert on Stonehenge featured on the show suggested that it is people being people, they observe the same things and put up similar worship centers, the host just laughed. He says he doesn't believe in coincidences yet they happen every day like when you think of someone and the phone rings, or run into someone you know thousands of miles away. People routinely do the same things over and over again in history without hearing about an example, extreme examples are bizarre behaviors of serial killers. A similar psychology applies to people who apply everything to aliens. The history channel has gotten far away from it's name and is indulging in fantasy
Review of America Unearthed
