AboutAncient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode in this hit HISTORY series gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate. Did intelligent beings from outer space visit Earth thousands of years ago?Documentary, History, ParanormalDownloadthe appThis dialog cannot be dismissed. You must accept the terms to continue.Legal Terms and PrivacyBy clicking "Accept & Close", you have read and agree to our Terms of Use and agree to the collection and use of your information by cookies and similar technologies, as set forth in our Privacy Policy.