Ancient Aliens

Starting in 1947, a series of unexplained events and sightings prompts U.S. government officials to become alien hunters; theorists offer evidence that similar endeavors were made thousands of years ago.

Theorists speculate about metal artifacts that could provide physical evidence of extraterrestrials visiting Earth in the distant past; in Jacksonville, Fla. A strange metallic sphere falls from the sky; an ancient aluminum wedge baffles historians.

In Wiltshire, England, Rudloe Manor appears to be nothing more than an English manor house, but researchers argue it has been the epicenter of British research into UFOs since World War II.

Ancient alien theorists speculate about why many of the architectural marvels of the ancient world bear striking similarities to one another even though they were built by civilizations separated by thousands of miles.

According to legend, a curse was placed on the tomb of King Tutankhamun; researchers theorize that the curse came about as the result of alien technology with the purpose of protecting the truth about an otherworldly event as well as an alien device.

Archaeologists and anthropologists make discoveries that receive no notice because they don't fit into the accepted scientific paradigm, such as an ancient hammer found in Texas or elongated skulls found on nearly every continent.

Researchers suggest that the ancient site of Teotihuacan in central Mexico was once home to a highly advanced, perhaps extraterrestrial, civilization; excavations at Teotihuacan have unearthed discoveries out of place in the ancient world.

Researchers find that dozens of megalithic sites across the globe were designed to emanate the exact same frequency, causing them to speculate that certain frequencies may allow humans to connect with extraterrestrial forces.

A memo from 1952 surfaces informing President-elect Dwight Eisenhower about the existence of a top-secret group of scientists, government officials and military personnel who are tasked with investigating reports of UFOs.

Researchers ask if Cloud computing represents the rediscovery of an ancient repository of knowledge known as the Akashic Record; neuroscientist Dr. Dario Nardi measures the brainwaves of Dr. Deepak Chopra as he enters a state of deep meditation.

Giorgio A. Tsoukalos studies India's Sanskrit texts, which are filled with descriptions of brain surgery, flying crafts, nuclear physics, and other advanced sciences; Hindu scholars attribute this knowledge to a time when gods walked among humans.

Theorists suggest that some extraterrestrials may closely resemble animals, as evidenced by gods depicted with animal traits; researchers suggest that some animals may have been planted here by aliens as part of an experiment to shape life on Earth.

While more than 1.5 billion people believe in reincarnation, ancient astronaut theorists suggest that extraterrestrials designed the human body to be a vessel for otherworldly entities.

Japanese legend states that the Ishi-no-Hoden megalith, carved from a single rock and weighing roughly 500 tons, was built to depict a sky ship made of stone that the ancient people witnessed descending from the heavens.

In China, hundreds of strange disks are discovered in a cave that appear to tell the story of an ancient extraterrestrial crash on Earth; shortly thereafter, the disks are confiscated by the Chinese government and dismissed as a hoax.

The ancient site of Göbekli Tepe challenges what archaeologists believe about the past; the megalithic stone complex was built over 12,000 years ago, 5,000 years before the first known civilization was said to have emerged in Mesopotamia.