Set Of 3 Pop Art Greeting Cards Happy Birthday Romantic Valentine?s Day 3 cards have interior sayings - on the inside with a light pop art graphic Comes with 3 envelopes Fans of superheroes and pop art will love these Printed on thick high quality cardstock Ancient Aliens is an American television series that premiered on April 20, 2010, on the History channel.[1] Produced by Prometheus Entertainment in a documentary style, the program presents hypotheses of ancient astronauts and proposes that historical texts, archaeology, and legends contain evidence of past human-extraterrestrial contact.The show has been widely criticized by historians, cosmologists, archaeologists and other scientific circles for presenting and promoting pseudoscience, pseudohistory and pseudoarchaeology. The series started with a TV special of the same name that aired on March 8, 2009, on the History channel. Seasons 1?3 aired on the same channel until 2011. From season 4 to the middle of season 7, the series aired on H2. On April 10, 2015, episode premieres returned to History channel. Season 15 premiered on January 24, 2020.