Schedule

Ancient Aliens is counting down the world's top ten mysterious devices, from strange, grooved disks found in a cave in China to an ancient Greek computer to an incredible crystal skull unearthed in Mexico.

Did a man in Turkey capture footage of alien pilots in a UFO cockpit? What are the strange lights repeatedly spotted over Brown Mountain in North Carolina since before the Civil War? Did an Australian man stumble upon an alien corpse on the sidewalk?

Ancient Aliens is counting down the world's top ten mysterious islands, including sites said to be home to giants, remote landmasses that are home to massive megalithic structures, and even islands that disappear into thin air.

Around the world and throughout history, people have reported seeing very similar types of unidentified objects in the sky. Now, Ancient Aliens is counting down the top ten alien craft, from V-shaped objects to orbs of light to flying saucers.

Today, more people than ever before believe that Unidentified Flying Objects are of alien origin. But 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.

Might an examination of Leonardo Da Vinci's masterful paintings, highly technical hand-drawn sketches, and private journals reveal knowledge of otherworldly technology and extraterrestrial beings?

Is it possible that sightings of alien beings or UFOs may actually be evidence of time travelers from the future? And might ancient astronauts actually be time travelers from our future?

Angkor Wat, Cambodia, is the world's largest ancient religious temple. Within its megalithic ruins, researches have discovered a depiction of a species of dinosaur--a stegosaurus.

At nearly 14,000 years old, the ruins of Puma Punku are the oldest and most baffling on the face of the Earth.

Why were ancient civilizations around the world so focused on the Orion constellation? While scientists site many earthly connections, researchers suggest this point in the night sky may have been a so-called Stargate, or entry point.

Genius is widely considered to be the ability to change the world in an incredible way: inventing new technology, deciphering the mysteries of the universe, or creating transcendent art. But where does genius come from?

More than 80% of the Earth's oceans remain unexplored, and in many ways, the underwater world is the final frontier. As new technology allows us to explore oceans and deep lakes more than ever before, what will we find?

From the ancient Babylonian's to modern day urban explorers, mankind has always been fascinated by abandoned places. What is the allure that draws us to these post-apocalyptic landscapes?

There are some events that are so destructive, so astounding, or truly miraculous--that for the faithful--they must be directed by the hand of the Almighty.

The animal kingdom is full of deadly predators, and some of them attack in extraordinary and inexplicable ways. Do some animals strike back at humans for reasons beyond normal defense and hunger? Can they have emotions like anger or a desire for revenge?

Throughout history humans have buried their dead--in caves or chambers, in pyramids or in some form of a tomb--but why? Ancient tombs were visual memorials for the dead.

As the mystery of a dead cow grows even stranger, a guest investigator alerts the team to a never before seen site that might hold the keys to unlocking the truth about Skinwalker Ranch.

Despite centuries of sightings and searches, one of the most infamous deep-sea monsters remains unidentified. As evidence continues to mount, the mystery endures: does the Loch Ness Monster really exist? And if so, what could it be?

It's one of the most infamous and unsolved mob murders--notorious mobster Bugsy Siegel is gunned down in his Beverly Hills living room.

Throughout the ancient world, structures were built to mirror the constellations in the night sky--and, in most cases, this is only apparent when they are viewed from high above the Earth.

Ever since the first atomic bomb was detonated in 1945, UFOs have been reported at nuclear facilities all over the world. Is it possible that extraterrestrials are monitoring humanity's nuclear capabilities? But why? Does this constitute a threat?