Discover the controversial theory that aliens have visited Earth for millions of years, from the age of the dinosaurs, to ancient Egypt, to the present-day U.S.
Metallic objects dating back hundreds of thousands of years; Mysterious metal spheres defying the laws of physics. Could these artifacts be physical evidence of extraterrestrials visiting Earth?
In Wiltshire, England lies the mysterious structure known as Rudloe Manor. Researchers have argued for years that it has been the epicenter of British research into UFOs since World War II.
The Giza pyramid complex in Egypt and the Avenue of the Dead in Mexico contain pyramids that are aligned with the constellation of Orion's belt. Could these sites have been designed by alien architects?
We examine The Pharaohs' Curse and the theory of how it was put in place to protect not only the truth about an otherworldly event in our past, but also an extraterrestrial device.
Has evidence been found that challenges the accepted dating of the Great Pyramid? And could clues about our extraterrestrial origins be hidden in discarded pieces of our past? Unexplainable elongated skulls and other artifacts are examined.
Was Teotihuacan--which the Aztecs called the "City of the Gods"-- once home to a highly advanced, perhaps extraterrestrial, civilization?
The planets each give off a distinct sound, and certain places on Earth have been found to produce a hum from an unknown source. Might the best evidence of alien intervention be found with our ears?
Probe the alleged top-secret group of scientists, government officials, and military elite called "The Majestic Twelve," whose mission was to facilitate recovery and investigation of alien spacecraft.
According to ancient mythologies, there is a universal repository of knowledge known as the Akashic Record. Could our ability to tap into the Akashic Record lead to the next huge leap in human evolution?
India's Sanskrit texts are filled with amazing stories about advanced technology in the ancient world. Giorgio A. Tsoukalos travels to India to further explore the texts, structures and technology.
Extraterrestrials are almost always envisioned as humanoid, but could some closely resemble other animals? Theorists suggest that certain animals were planted here by alien visitors.
Ancient Astronaut Theorists suggest that not only does reincarnation exist, but our extraterrestrial ancestors specifically designed the human body to be a vessel for otherworldly entities.
Carved from a single rock and weighing roughly 500 tons, Ishi-no-Hoden is just one of numerous megalithic structures found throughout Japan. Could its origins lie beyond Earth?
Strange disks are discovered in a cave in China, confiscated by the Chinese government and dismissed as a hoax. Do they tell the story of an ancient extraterrestrial crash on Earth?
The ancient site of Gobekli Tepe challenges everything modern archaeologists believe about mankind's past. Could it serve as the smoking gun for a lost civilization?
