Ancient Aliens

Did a biblical patriarch receive instructions from 200 angels high above the earth? Were the ancient Greeks taught how to work metal by a race of fish-people? And might Egypt's most controversial pharoah have been an extraterrestrial being?

Ancient Astronaut Theorist Giorgio Tsoukalos takes a look back at The Top Ten Extraordinary Creatures we've investigated - creatures that just might provide compelling evidence of extraterrestrial visitation.

Ancient Aliens is counting down the top ten locations around the world that might be hiding alien bases, including a cavern beneath the ice of Antarctica, a lake in China that is a hotspot for UFOs, and a pyramid under the slopes of Mt. Denali.

Ancient Aliens is counting down the top ten scariest encounters that just might be evidence of extraterrestrial visitation. From an encounter in rural Texas that left onlookers with unexplainable injuries, to mysterious cattle mutilations.

Ancient Aliens is counting down ten of the most intriguing and mysterious symbols and codes found that just might contain proof of otherworldly contact. From glyphs in the Peruvian desert, to spiral petroglyphs embedded with advanced mathematics.

Ancient Aliens is counting down the top ten disasters ever documented with a possible otherworldly connection, from a flying monster at a nuclear incident, a meteor that wiped out the dinosaurs, and a deadly virus that might be from another world.

The ancient Sumerians established what is considered the world's first civilization, and they credited their extraordinary achievements to their gods, the Anunnaki. But is it possible that these beings were extraterrestrial visitors to Earth?

For years, Scotland has been an epicentre of otherworldly phenomena. It is home to ancient stone circles, stories of strange beings and a major hotspot for UFO sightings. Could it be that Scotland is a magnet for extraterrestrial visitors?

Along the Earth's north 37th parallel there have been so many reports of UFO's and other mysterious events that it has been dubbed The UFO Superhighway. Could there be something about this latitude that is attracting extraterrestrial visitors?

There are mysterious ancient stones shaped into perfect spheres. Many of them show clear evidence of being manmade and some completely defy explanation. Could the mystery of the stone spheres provide clues about humankind's alien past?

Considered by many to be the greatest civilization in the history of the Americas, the Maya thrived for more than 2,000 years. Now, new evidence is being discovered that completely upends our understanding of this ancient culture.

For years, cultures around the world have held a belief in stargates through which beings have traveled to Earth from distant points in the universe and even other dimensions. Could such portals truly exist?

For decades, incredible claims have been made about an extraterrestrial presence on Earth and the government has gone to great lengths to discredit them. Are we nearing the day when whistleblowers will finally be taken seriously?

For years, humankind has attempted to make contact with beings from beyond Earth. Now, with new technologies allowing us to explore billions of stars across the universe, are we on the verge of first contact?

Dr. Jacques Vallee is best known for his revolutionary work in the field of UFOs, and his bold theories challenge our notions of alien life. Will his incredible work lead to answers about what has been happening in our skies for thousands of years?

Throughout ancient cultures there are stories of god-like beings providing instruction to early humans, helping our ancestors to establish the first civilizations and teaching them in various disciplines. Could it be true?

Beneath the sands of Egypt lie 24 enormous sarcophagi and every one of them is empty. What purpose might these giant tombs have served? And is it possible that the perfectly carved boxes were designed not by humans... but by otherworldly visitors?

For more than four decades, award-winning journalist Linda Moulton Howe has covered the most mysterious phenomena on Earth. Could her investigations on bizarre animal deaths to crop formations and alien abductions lead us to a profound new reality?

The Chosen: From biblical patriarchs to modern day alien abductees, throughout history, there have been people who claimed to have contact with otherworldly beings.

Resurrecting Puma Punku: Puma Punku in Bolivia features some of the largest stone blocks on Earth, each carved with incredible precision.