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Ancient 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?

Genres: Drama | Science-Fiction
Station: History (US)
Rating: 8.5/10 from 8 users
Status: Running
Start: 2009-03-08

Ancient Aliens Season 21 Air Dates


S21E01 - The Top Ten Extraordinary Discoveries Air Date: 08 February 2025 02:00 -

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Ancient Aliens is counting down ten of history's most astonishing discoveries – breakthroughs that challenge traditional beliefs about human history. From a lost city hidden in the Andes to mysterious metal spheres that are not of this world and a sunken city that was said to be the home of the gods, could these discoveries provide proof of extraterrestrial contact?


S21E02 - The Top Ten Mysterious Monoliths Air Date: 15 February 2025 02:00 -

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Ancient Aliens is counting down the world's top ten most mysterious monoliths, from a 500-ton stone believed to represent an ancient UFO, to giant statues said to have been created with advanced technology, and ornate pillars that depict otherworldly visitors. Could these extraordinary standing stones provide evidence of extraterrestrial visitation?


S21E03 - The Top Ten UFO Crashes Air Date: 22 February 2025 02:00 -

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Ancient Aliens is counting down ten of the most compelling UFO crashes that have been reported across the globe. From an acorn-shaped object that crashed in the woods of rural Pennsylvania, to a mysterious craft that washed ashore in Japan, and an earth-shaking impact in Britain that defies explanation, are these mysterious events proof that our planet has been visited by extraterrestrials?


S21E04 - The Top Ten Unexplained Technologies Air Date: 01 March 2025 02:00 -

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Ancient Aliens is counting down ten of the most astonishing--and unexplainable--technologies in history. From mysterious golden orbs discovered in Mexico, to a sacred wooden box that could communicate with the heavens, and an ancient tomb that is said to depict an astronaut, might these sensational artifacts be evidence of otherworldly contact?

Next Episode of Ancient Aliens is

Season 21 / Episode 2 and airs on 15 February 2025 02:00

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