Ancient Aliens

In 2021, the United States government breaks a 70-year precedent of denying UFOs and releases a groundbreaking report on Unidentified Aerial Phenomena. Are we on the brink of full government disclosure?

It is one of the greatest mysteries of the prehistoric world: why did people on nearly every continent erect giant standing stones?

Some of the world's most iconic sacred temples are built atop the ruins of structures that are far more ancient. What compelled early humans to rebuild in the same places again and again? Could they be points of ancient alien contact?

Across the globe, high-ranking government officials are openly talking about Unidentified Aerial Phenomena. Ancient Astronaut theorists suggest the evidence has become too great to ignore.

Some 2,600 years ago, the most-sacred relic of the ancient world suddenly disappeared from history: The Ark of the Covenant. Could descriptions of the Ark's incredible power reveal that it was a highly advanced technological device?

In the traditions of native peoples across North America are stories of the Star Ancestors -- powerful beings who descended to Earth in the distant past and are sometimes present even today.

Since 2017, the Navy has been releasing photos and videos of Unidentified Aerial Phenomena -- and Ancient Astronaut theorists suggest the incredible images are nearly identical to accounts from centuries ago.

Millions of people around the world have reported encountering shadowy entities who instill fear, shortness of breath and even paralysis. Is it possible that the so-called "Shadow People" are more than mere figments of the imagination?

Throughout the ancient world, tales were told of fire-breathing dragons. Is it possible that what our ancestors described as winged monsters descending from the sky were visitors from other worlds?

Today, more people than ever before believe that Unidentified Flying Objects are of alien origin. If extraterrestrials have come to Earth from lightyears away, could they be capable of bending both time and space?

Ancient Aliens has traveled to many mysterious sites that seem to defy explanation. Now, Giorgio Tsoukalos takes a look back at some of the most incredible structures we've visited all over the world.

Giorgio Tsoukalos takes a look back at the most extraordinary encounters that, as far as he's concerned, provide evidence of an extraterrestrial presence on Earth.

Giorgio Tsoukalos takes a look back at the incredible hieroglyphs, petroglyphs, and geoglyphs that he believes tell a worldwide story--of alien visitation.

Giorgio Tsoukalos takes a look back at the most compelling investigations of all, and events that he believes represent real encounters with extraterrestrial visitors.

Giorgio Tsoukalos takes a look back at the most mysterious artifacts from all over the globe -- artifacts that he believes provide undeniable proof of extraterrestrial contact.

Giorgio Tsoukalos takes a look back at the most incredible evidence ever uncovered that could offer definitive proof that we are not alone in the universe.

In Ireland, the notion of the fairy folk originates from stories of powerful shining beings who came down from the sky. Could these tales have been inspired by ancient alien visitation?

Ancient cultures around the world often referred to the gods as the "Immortals" -- but could they have encountered extraterrestrial beings that had achieved eternal life?

In the nearly 2,000-year-old text called "The Zohar", there is a curious passage that describes hidden realms beneath the surface of the Earth -- each of which is said to be populated by both human and non-human intelligences.

In the 20th century, a mysterious British woman who claimed to be the reincarnation of an ancient Egyptian priestess shocked Egyptologists by accurately locating countless structures and artifacts in the Nile Valley. Could it be true?