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Ancient Aliens is counting down the top ten alien petroglyphs around the world, from strange, human-like figures to flying craft and carvings of what appear to be astronauts. Could these mysterious carvings provide a record of extraterrestrial visitation?

Ancient Aliens is counting down the top ten mysteries of the deep, from sunken continents to puzzling ruins on the ocean floor and even artifacts that might be remnants of Atlantis. Could these underwater mysteries provide a record of extraterrestrial visitation?

A young man's spiritual journey. A controversial bestseller. And a scientific theory that threatened to change the world. Just what are the facts behind Erich von Daniken and Ancient Astronaut theory? For more than 40 years, his books have sold over 65 million copies worldwide. He is a hero to some, and a heretic to others--but Erich von Daniken's controversial theories have captured the attention of the world and ignited a movement known as Ancient Astronaut Theory. His exhaustive search for the truth about mankind's otherworldly origins have started to gain acceptance with a small but growing number of Ancient Astronaut theorists--men and women who have expanded, and at times refined, von Daniken's findings. Did ancient astronauts really come to planet Earth? And, if so, what was their purpose? And perhaps even more important--will they come again?

In ancient times, people spoke about divine substances that were consumed by the gods, and sometimes gifted to humans to impart great power, wisdom, and even immortality. But could it be that the food of the gods was really sustenance for alien visitors? And might it provide important information for humanity's future in the stars?

As humanity prepares to establish colonies beyond Earth, are we simply realizing mankind's future or returning to its extraterrestrial past? And when humans become the alien visitors on other planets, what--or whom--will we encounter?

Informational programming.

Informational programming.

Informational programming.

Informational programming.

Ancient Aliens is counting down the top ten alien petroglyphs around the world, from strange, human-like figures to flying craft and carvings of what appear to be astronauts. Could these mysterious carvings provide a record of extraterrestrial visitation?

Ancient Aliens is counting down the top ten mysteries of the deep, from sunken continents to puzzling ruins on the ocean floor and even artifacts that might be remnants of Atlantis. Could these underwater mysteries provide a record of extraterrestrial visitation?

A young man's spiritual journey. A controversial bestseller. And a scientific theory that threatened to change the world. Just what are the facts behind Erich von Daniken and Ancient Astronaut theory? For more than 40 years, his books have sold over 65 million copies worldwide. He is a hero to some, and a heretic to others--but Erich von Daniken's controversial theories have captured the attention of the world and ignited a movement known as Ancient Astronaut Theory. His exhaustive search for the truth about mankind's otherworldly origins have started to gain acceptance with a small but growing number of Ancient Astronaut theorists--men and women who have expanded, and at times refined, von Daniken's findings. Did ancient astronauts really come to planet Earth? And, if so, what was their purpose? And perhaps even more important--will they come again?

As humanity prepares to establish colonies beyond Earth, are we simply realizing mankind's future or returning to its extraterrestrial past? And when humans become the alien visitors on other planets, what--or whom--will we encounter?

In ancient times, people spoke about divine substances that were consumed by the gods, and sometimes gifted to humans to impart great power, wisdom, and even immortality. But could it be that the food of the gods was really sustenance for alien visitors? And might it provide important information for humanity's future in the stars?

Ancient Aliens is counting down the top ten alien petroglyphs around the world, from strange, human-like figures to flying craft and carvings of what appear to be astronauts. Could these mysterious carvings provide a record of extraterrestrial visitation?

Ancient Aliens is counting down the top ten mysteries of the deep, from sunken continents to puzzling ruins on the ocean floor and even artifacts that might be remnants of Atlantis. Could these underwater mysteries provide a record of extraterrestrial visitation?

A young man's spiritual journey. A controversial bestseller. And a scientific theory that threatened to change the world. Just what are the facts behind Erich von Daniken and Ancient Astronaut theory? For more than 40 years, his books have sold over 65 million copies worldwide. He is a hero to some, and a heretic to others--but Erich von Daniken's controversial theories have captured the attention of the world and ignited a movement known as Ancient Astronaut Theory. His exhaustive search for the truth about mankind's otherworldly origins have started to gain acceptance with a small but growing number of Ancient Astronaut theorists--men and women who have expanded, and at times refined, von Daniken's findings. Did ancient astronauts really come to planet Earth? And, if so, what was their purpose? And perhaps even more important--will they come again?

When a cow suddenly and mysteriously dies on the ranch, surveillance footage poses another worldly explanation.

The use of mantras and chanting to connect with a higher plane has existed in cultures all over the world dating back thousands of years, but why would people who had no contact with each other all subscribe to this practice? Could there be certain frequencies that connect us with greater--perhaps extraterrestrial--forces? Researchers have found that dozens of megalithic sites stretching across the globe--like the prehistoric Newgrange monument in Ireland, the chiseled labyrinths underneath the island of Malta, and the giant temple complex of Angkor Wat in Cambodia--were all designed to emanate the exact same frequency. The planets in our solar system each give off a distinct sound, and certain places on Earth, like Taos, New Mexico, have been found to produce a hum from an unknown source. Might the best evidence of alien intervention on Earth be found not with our eyes... but with our ears?

For centuries, humanity has been fixated on Mars--the glowing red orb in the night sky. As a new era of exploration of the Red Planet begins, we are on the cusp of finally solving the Red Planet's mysteries. Ancient cataclysms are believed to have left Mars barren, but science continues to find clues that this red planet was once blue and capable of producing life. Will we finally uncover evidence of life on Mars, once we finally set foot there? And what else might we discover on this mysterious planet?

They've been called the world's greatest archaeological enigma. 2,000-year-old geoglyphs made in the Peruvian desert that span over 50 miles. The drawings are so massive, they can only be seen from the air. Can new research finally unravel their secrets? What is the true purpose of the incredible Nazca Lines?

During WWII, the Nazis stole vast amounts of art, gold, silver and currency, and stashed it across Europe. While some of the plunder has been recovered, much more is still missing nearly 80 years later. Where did the Nazis take their stolen loot? And can it ever be found?

The U.S. military has long denied that the infamous 1947 Roswell crash was anything other than a weather balloon, but FBI files released in 2011 include a memo to J. Edgar Hoover regarding the recovery of not one, but three "flying saucers." Could the U.S. government really have extraterrestrial crafts in their possession? Ancient Astronaut theorists say yes, and claim that Roswell is just the tip of the iceberg. Over a dozen other UFO crashes were reported all across the world around the same time as Roswell, and it is rumored that the wreckage from these incidents was retrieved and hidden away at secret military bases like Area 51 in Nevada, Kapustin Yar in Russia, Pine Gap in Australia, Rudloe Manor in England, and even in the remote hills of China. But if true, what happened to these alien spaceships?

For centuries, humanity has been fixated on Mars--the glowing red orb in the night sky. As a new era of exploration of the Red Planet begins, we are on the cusp of finally solving the Red Planet's mysteries. Ancient cataclysms are believed to have left Mars barren, but science continues to find clues that this red planet was once blue and capable of producing life. Will we finally uncover evidence of life on Mars, once we finally set foot there? And what else might we discover on this mysterious planet?