Ancient Aliens S18E13: "Decoding the Alien Glyphs"

​Oh, what a surprise: Another clip show! This time, the topic is ancient paintings and carvings, and once again the episode is comprised of various segments from previous seasons. So, perhaps I should take the space to point instead to a new Popular Mechanics article purporting to discuss the supposed science behind the claim that UFOs are time-traveling future humans returning to our time. It’s ridiculous—we might equally invent scientific rationales for Marvel heroes’ superpowers (oh, wait—everyone does that, too)—but perpetuates the idea that the time-travel speculation in ufology circles is a serious enterprise and not science-fiction fantasy. But, on to the show, as hosted atop a rock by Giorgio Tsoukalos again this week:  

1. Val Camonica, Italy. The first segment is taken from the second segment of a 2019 episode on mountains.
2. Edfu, Egypt. The second segment is the tail end of the show’s 2018 “Earth Station Egypt” special on the temple of Edfu.
3. Native geoglyphs near former lakebeds. The third segment was originally the second segment of a 2018 episode on deserts claiming that southwestern U.S. geoglyphs marked the original Aztec homeland.
4. Native American petroglyphs. The fourth segment covering Zuni petroglyphs comes from a 2014 episode in which a fitter and better-coiffed Giorgio Tsoukalos hunted “Aliens in America.” The segment pulls off one surprise. With too little material to fit the time, it also crams in part of a segment from a 2016 episode on “The Wisdom Keepers” featuring Australian petroglyphs.
5. “Egyptian” hieroglyphs in Australia. The following segment continues replaying the succeeding part of “The Wisdom Keepers” on supposed (and very fake) “Egyptian” carvings in Australia.
6. Marquesas Islands. The final segment was originally part of segment 2 of “The Sentinels,” covering rock carvings on the Marquesas Islands.