History HD

Did a UFO in Texas streak across the sky during a solar eclipse? Is a giant creature making waves in a Canadian river? Could a mysterious metal sphere found in the woods actually be alien technology? Tony Harris and his team look at the evidence.

Learn about the wonderful world of Coin Collecting with your host Mike Mezack and get the opportunity to build your own collection with the best coin deals on TV!

Learn about the wonderful world of Coin Collecting with your host Mike Mezack and get the opportunity to build your own collection with the best coin deals on TV!

Theorists suggest that extraterrestrials have been communicating with mathematicians and engineers through the universal language of mathematics and binary code, influencing Nikolai Fyodorov and other visionaries to advocate for space exploration.

Accounts of creatures that can shape shift from one form into another can be found, but could similarities between the ancient stories and modern-day alien abduction accounts reveal that shape shifters are real and have come to Earth.

Nestled within a remote valley in Utah is a ranch that some believe is a hotbed of strange, inexplicable phenomena including terrifying creatures, paranormal apparitions and lights in the sky.

UFO witnesses have reported a wide variety of objects in Earth's skies and not only in modern times, but for centuries; could they offer important clues about other intelligent life.

Ancient cultures recorded stories of enormous beings that descended from the sky; exploring if massive megalithic structures and reported discoveries of towering human-like skeletons reveal that the world was once inhabited by giants.

Some 2,600 years ago, a sacred relic of the ancient world disappeared from history: The Ark of the Covenant; discussing if descriptions of the Ark's power could reveal what it truly is, or if it has a connection to humanity's extraterrestrial past.

A multitude of guests and scientists explores everything from human origins to groundbreaking archaeological finds, new understandings of the cosmos, and the profound possibility that humans are not alone in the universe.

Strange ancient objects that leave archaeologists at a loss could suggest that an advanced extraterrestrial civilization existed on Earth for thousands of years.

Examining the unique geology and location of Mount Shasta in northern California, to determine why it is known as a hotbed of strange events, from Big Foot sightings to UFO encounters to hikers vanishing without a trace.

Throughout the ancient world, tales are told of fire-breathing dragons; though fearsome, they have been worshipped as the bringers of great knowledge and credited as the founders of civilization.

Following investigators across the globe as they go to the sites where signs of alien life have been found; Giorgio Tsoukalos takes a look back at incredible evidence that could offer definitive proof that humans are not alone in the universe.

"Ancient Aliens" has examined the oldest and most mysterious rock art on Earth up close, and Giorgio Tsoukalos takes a look back at the incredible hieroglyphs, petroglyphs, and geoglyphs that he believes tell a worldwide story of alien visitation.

Throughout the ancient world, there are depictions of mysterious figures that appear to be half human and half bird. In many cultures, they are revered as divine and have magical abilities. But could these so-called "Birdmen" have truly existed? And if so, just what were they?

Volcanoes have inspired countless myths and legends, but curiously, they are also major hotspots for UFO sightings; is it possible that these geological formations, which can generate great energy, are attracting otherworldly visitors?

In the 20th century, pioneering scientists, journalists and investigators defied convention and began documenting UFOs; experts in the 21st century look for undeniable proof of extraterrestrial visitation.

More than 10,000 crop circle formations have been documented in over 50 countries.

Throughout the ancient world, there are depictions of mysterious figures that appear to be half human and half bird. In many cultures, they are revered as divine and have magical abilities. But could these so-called "Birdmen" have truly existed? And if so, just what were they?