Ancient Aliens 17, The Mystery Of Nan Madol

Rumours are rife that aliens inhabit the continent of Antarctica, but is it true? This episode explores the icy wilderness to find out.

The series investigates satellite images of what seems to be a giant face carved into the earth in Alberta. Could this have extraterrestrial origins?

Physicist Bob Lazar says he was hired to reverse-engineer an alien spacecraft by the US government, with a fuel source had the power to change the world.

Experts investigate whether aliens from a tiny star visited humans in the past, and left behind a clue that still remains in our language.

From octopuses that can edit their DNA to jellyfish that can live forever, the ocean is full of unusual creatures. Were they delivered to Earth by extraterrestrial beings?

When Spanish Conquistadors obliterated the Mayan people's history, could they have erased proof of extraterrestrial visitors? Experts investigate.

Experts examine strange stone structures on New England and New York's landscapes. Could they be clues of alien visitors to Earth?

Serpent gods are found in many religious texts. Could these stories be describing reptile-like extraterrestrials? And are they still here today?

Is our planet prepared for an extraterrestrial invasion of disease? And could past plagues have been brought to Earth by aliens? Experts investigate.

Experts explore animal mutilations and alien abductions as they ask whether extraterrestrials could be altering human DNA.

Could ghosts and angels be visitors from other-worldly realms? A team of ancient alien theorists explores.

Could Hawaii's islands have once been inhabited by extraterrestrials? Experts investigate whether its volcanoes provide a portal between space and time.

Experts check out structures built to mirror the constellations. Could they have been built as a message to extraterrestrials?

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Could this signal a threat to mankind?

Experts investigate an Italian mountain that's stood witness to inexplicable phenomena for centuries. Could it somehow be attracting alien visitors?

Could aliens have given our brains incredible untapped abilities? Experts ask whether harnessing these hidden powers could spark the next step in our evolution.

A DNA study released in 2018 revealed that the builders of Stonehenge mysteriously vanished - did they head back to a home among the stars?

Experts question the link between divine substances and extraterrestrials. Could the food of the gods really have been sustaining Earth's alien visitors?

Tattoos, piercings and body modifications are big business. But could our desire for these changes stem from a profound link to our ancestors?

When millions responded to a call to storm Area 51, the US military vowed deadly force. Are they hiding the truth about extraterrestrials on Earth?

Over the past 20 years, thousands of potentially habitable exoplanets have been found. Could they be home to intelligent extraterrestrial life?

Giorgio A Tsoukalos and David Childress explore the mysterious chain of man-made islets in Micronesia's Nan Madol. Could local legends be true?

In 1947, the US military collected debris of what they claimed was a crashed weather balloon outside Roswell, New Mexico. But was there more to it?

Chile has the highest number of UFO sightings of anywhere on Earth. Now, incredible footage of a strange craft has people asking again about the reasons why.

From Egypt to Easter Island, towering figures built by ancient man stand watch over Earth. But do they depict visitors from another world?

New evidence reveals advanced civilisations might have existed on Earth thousands of years ago - is it possible that they lived with extraterrestrials?

In numerous ancient cultures, stories were told of ancestors from the Pleiades star cluster - could new scientific findings reveal the truth?

In the Mojave Desert, there is a structure built to bestow everlasting life, and according to the architect, its blueprint is from another world.

Accounts of creatures that can shapeshift from one form to another can be found throughout history. But are they real and do they have otherworldly origins?

Nestled in Utah lies a ranch some believe to be a hotbed of strange phenomena. Is it all connected to an alien entity known as the Skinwalker?

UFO witnesses have reported a variety of objects in Earth's skies for centuries - could they offer clues about more intelligent life in our galaxy?

The White House has consistently denied any knowledge of aliens, but is it in fact possible that extraterrestrials have been influencing presidents?

What is it about the number 12? It holds divine significance in numerous sacred traditions and it's found repeatedly in ancient architecture. But why?

According to the earliest Tibetan traditions, hidden in the Himalaya Mountains is Shambhala, a kingdom of the gods. Does this mystical realm truly exist?

An exploration of the possibility that The Book of Enoch was stricken from the Bible because it documents humanity's extraterrestrial origins.

The mysterious symbol of the keyhole exists in mystic texts, sacred architecture and ancient artwork found all over the planet. Is there more to it than meets the eye?

Do the reported discoveries of towering, human-like skeletons reveal that the world was once inhabited by giants?

Throughout the world, ancient objects have been found that leave archaeologists at a loss. What do they reveal about the world we live in today?