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Go BackAncient Aliens

Ancient Aliens Season 4

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Here's where to watch every episode of Ancient Aliens season 4. Mouseover or tap an episode to see where to stream it. Click or tap the play icon to stream it on the best available service.
Season 04, Episode 01 The Mayan Conspiracy

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Feb 18, 2012
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The Mayan Conspiracy Feb 18, 2012 The Mayan civilization dominated Central America for nearly 2000 years, but by the 9th century A.D., the great Mayan cities were abandoned, and the Mayan people vanished. What could have happened to this advanced culture? Might the Maya have left clues as to how they surpassed other cultures in science, mathematics, time keeping, and most importantly, astronomy? In recent years, hieroglyphs have been decoded to reveal that the Maya were able to accurately predict shifts in the Earth's axis every 26,000 years. Inscriptions on the sarcophagus of their most prominent ruler, King Pakal, tell of a journey to the Milky Way. And a sophisticated calendar foretells of the end of the world in 2012. Most striking is their belief that knowledge was passed to them by otherworldly beings who descended from the sky. Could the ancient Maya have actually conspired with extraterrestrial visitors to plan the future--and even the very end of the world?

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Season 04, Episode 02 The Doomsday Prophecies

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Feb 18, 2012
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The Doomsday Prophecies Feb 18, 2012 The Maya created the most sophisticated calendar systems in the ancient world, and according to many scholars their Long Count Calendar will come to an end on December 21, 2012. What does this mean for mankind? Some researchers believe it will usher in the return of Bolon Yokte--a mysterious god associated with creation and war. Could this god actually be an extraterrestrial as some ancient astronaut theorists believe? Other scholars believe the end of the calendar will bring about a series of catastrophic events that may threaten the very existence of mankind. They point to a rare galactic alignment that will coincide with the end of the Mayan calendar as proof of an impending geological catastrophe. If these doomsday prophecies prove to be true, will it mean the end of the world as we know it? Or could it reveal some profound truth about the origins of the human race?

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Season 04, Episode 03 The Greys

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Feb 25, 2012
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The Greys Feb 25, 2012 Who are the beings with big heads and giant eyes that seem to have been visiting our planet for millennia? Known by researchers as the "greys," these mysterious beings have been depicted in rock-art and carved stone figures throughout the ages and all over the world. Who are they, what planet do they come from, and what do they want?

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Season 04, Episode 04 Aliens and Mega-Disasters

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Mar 3, 2012
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Aliens and Mega-Disasters Mar 3, 2012 There are numerous historical, religious and mythic accounts of ancient civilizations being wiped out by volcanoes, earthquakes, floods, and meteors. Did god, or nature bring about such disasters? Or is it possible that celestial beings had a hand in the ancient world's catastrophic disasters?

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Season 04, Episode 05 The NASA Connection

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Mar 10, 2012
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The NASA Connection Mar 10, 2012 NASA scientists, former astronauts and secret government files all point to the conclusion that there has been contact with extraterrestrial life in the past. Researchers examine this and other recent scientific evidence that may provide proof of alien contact in both the recent and ancient past.

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Season 04, Episode 06 The Mystery of Puma Punku

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Mar 17, 2012
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The Mystery of Puma Punku Mar 17, 2012 At nearly 14,000 years old, the ruins of Puma Punku are the oldest and most baffling on the face of the Earth. No one knows who designed and built this complex of sophisticated inter-locking blocks, and then vanished. Researchers investigate the ruins on-location in Peru and present new computer analyses. Forensic evidence on the ground, together with local myths and legends, suggest this site may have been designed and even once inhabited by a species of extraterrestrials.

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Season 04, Episode 07 Aliens and Bigfoot

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Mar 24, 2012
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Aliens and Bigfoot Mar 24, 2012 People on every continent have claimed to see the footprints of Bigfoot. And ancient myths and legends speak of an ape-like giant stalking the earth. What if, as Ancient Astronaut theorists believe, there is evidence to connect Bigfoot with an alien species that once visited Earth in the distant past?

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Season 04, Episode 08 The Da Vinci Conspiracy

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Apr 7, 2012
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The Da Vinci Conspiracy Apr 7, 2012 Might an examination of Leonardo Da Vinci's masterful paintings, highly technical hand-drawn sketches, and private journals reveal knowledge of otherworldly technology and extraterrestrial beings?

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Season 04, Episode 09 The Time Travelers

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Apr 28, 2012
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The Time Travelers Apr 28, 2012 Is it possible that sightings of alien beings or UFOs may actually be evidence of time travelers from the future? And might ancient astronauts actually be time travelers from our future? Scientists explore the theoretical possibility of time travel. How can it be achieved? And what might people from 10,000 years in the future look like?

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Season 04, Episode 10 Aliens and Dinosaurs

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May 5, 2012
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Aliens and Dinosaurs May 5, 2012 Angkor Wat, Cambodia, is the world’s largest ancient religious temple. Within its megalithic ruins, researches have discovered a depiction of a species of dinosaur – a stegosaurus. But how could the ancients have had knowledge of animals that mainstream science says died out millions of years ago? Why are dinosaurs extinct? Did an alien race of beings kill off the dinosaurs to make room for humankind?

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Season 04, Episode 11 Secrets of the Pyramids

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May 19, 2012
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Secrets of the Pyramids May 19, 2012 For thousands of years, pyramids were the largest structures on Earth. The best known were constructed in Egypt and Central America, but others have been found all around the world, including in China, Africa and Indonesia.

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Season 04, Episode 12 Aliens and Cover-Ups

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May 26, 2012
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Aliens and Cover-Ups May 26, 2012 In 1980, three young military men were sent into a UK forest to investigate strange lights. They reportedly encountered a spacecraft of unknown origin.

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Season 04, Episode 13 Alien Power Plants

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Jan 5, 2013
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Alien Power Plants Jan 5, 2013 Egyptian hieroglyphs depict the use of light bulbs in tombs and secret chambers. And batteries may have been discovered among artifacts from Mesopotamia. Did the Ancients understand electricity, and if so, how did they discover this technology?

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Season 04, Episode 14 Destination Orion

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Jan 12, 2013
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Destination Orion Jan 12, 2013 Why were ancient civilizations around the world so focused on the Orion constellation? While scientists site many earthly connections, researchers suggest this point in the night sky may have been a so-called Stargate.

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Season 04, Episode 15 The Einstein Factor

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Jan 19, 2013
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The Einstein Factor Jan 19, 2013 Was Albert Einstein a genius? Or was he superhuman? Was his genius "of this world," or was it "otherworldly?" Is it possible, as Ancient Astronaut theorists believe, of an extraterrestrial connection to the scientific genius of famous historical figures.

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