The History Channel

If ancient aliens visited Earth in the remote past, could they have given us advanced technology, past down through human history? And could this technology have helped the Third Reich build mysterious weapons and crafts far beyond the limits of 20th century science? During World War II, there were reports that the Germans built an operational flying saucer, known as the Hanebu, which was said to use mythical technology found in ancient Indian texts. Another craft was rumored to have been constructed with the help of psychics and mediums who claimed to have received detailed blueprints from extraterrestrial beings. Is it possible Hitler's quest for world domination was aided and abetted by ancient extraterrestrial technology that was rediscovered? And could the allegedly rebuilt alien devices developed in Germany have played a role in America's ability to land a man on the moon?

Superhuman strength... Supernatural powers... And the awesome ability to fly. Throughout history, mankind has told incredible tales of gods with extraordinary powers. But are these accounts merely tall tales, or could they be based on factual events? If mythical gods really did exist, were they, as ancient astronaut theorists believe, extraterrestrial beings? And could this help to explain the enduring popularity of gods, titans and other so-called "super-heroes"?

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. But how could the ancients have had knowledge of animals that mainstream science says died out millions of years ago? Why are dinosaurs extinct? Did an alien race of beings kill off the dinosaurs to make room for humankind?

If extraterrestrials influenced human history, can evidence of their existence be found in hidden tunnels and caverns around the world? Could a cave in Ecuador contain metallic books inscribed with secrets of alien technology? Was an ancient underground city in Turkey built with alien help... or as a refuge from an alien attack? Rumors of the U.S. military working alongside aliens in a secret base inside a mesa in New Mexico continue to swirl, Native American legends mention strange inner-Earth beings, and recent archaeological discoveries in the Yucatan may point to an extraterrestrial reality behind.

If ancient aliens visited Earth in the remote past, could they have given us advanced technology, past down through human history? And could this technology have helped the Third Reich build mysterious weapons and crafts far beyond the limits of 20th century science? During World War II, there were reports that the Germans built an operational flying saucer, known as the Hanebu, which was said to use mythical technology found in ancient Indian texts. Another craft was rumored to have been constructed with the help of psychics and mediums who claimed to have received detailed blueprints from extraterrestrial beings. Is it possible Hitler's quest for world domination was aided and abetted by ancient extraterrestrial technology that was rediscovered? And could the allegedly rebuilt alien devices developed in Germany have played a role in America's ability to land a man on the moon?

Was life triggered by some event, like lightning hitting a pond full of amino acids? Earth was teeming with life billions of years before the dinosaurs existed. Single-celled organisms inundated the oceans, and the soil swarmed with living creatures. Where did it all come from and how do you go from a single-celled organism to a trillion-celled organism like Man? Cutting-edge science is testing out answers about life's origins and how life can be created on new worlds--or even our own.

They've discovered water on other planets, and snatched the actual building blocks of life from a comet's tail. But can space probes find a new Earth...and even make contact with alien life? In the 21st century, space probes are photographing, drilling and even sniffing new worlds in the quest for life, and scanning thousands of distant suns trying to detect Earth-like planets. It's only a matter of time before space probes unlock the secrets to extra-terrestrial life and the universe itself.

Travel from the inner solar system to the Kuiper Belt and explore the moons surrounding the planets of the solar system. Many of these moons that were once unknown are now on the cutting edge of astronomical study. Some burst with volcanic fury another spews icy geysers and others offer the possibility of alien life. Are these strange worlds simply hostile environments unfit for humans or do other possibilities exist? Cutting-edge computer graphics are used to bring the universe down to earth and to imagine what kind of life forms might evolve in alien atmospheres.

Who are the beings with big heads and giant eyes that seem to have been visiting our planet for millennia? Known by researchers as the "greys," these mysterious beings have been depicted in rock-art and carved stone figures throughout the ages and all over the world. Who are they, what planet do they come from, and what do they want?

Mass suicides. Human sacrifices. Unholy rituals. Throughout history, people have claimed to have otherworldly knowledge, and have led followers to commit horrific acts of violence. Are they con men? Are they insane? Or might the voices in their heads really be of an extraterrestrial origin? And if so, did they simply misinterpret the messages they received? Or might there be extraterrestrials with a sinister agenda?

In America, behind the public facade of nine of our most famed institutions and landmark structures, there is another world that is hidden from view. The special pierces the veil of secrecy which conceals forbidden histories and fascinating insider information from the public. Go behind the walls of the Washington Monument to reveal a series of secret symbols and codes, one which was put there by one of the world's most mysterious societies. Dig deep into the dark past of Governor's Island and unearth another possible motive for the assassination of Abraham Lincoln. While in the heart of America, the Book of Secrets will uncover the shadowy past of the architect behind the St. Louis Gateway Arch and show how it relates to a theory that the Arch contains mystical powers which ultimately control the weather. Through exclusive channels of access and deep research, viewers will be taken behind the locked doors of seemingly familiar places, into worlds they weren't intended to see.

Despite the best efforts of the US government, legal and illegal, Fidel Castro still rules in Havana. The target of a protracted and often bizarre series of assassination attempts, he survived them all. Using unique footage from the former East Germany, this program will explore his career and his skill at avoiding death. It will also trace the widely accepted theory that the CIA's failed assassination attempts were what prompted Lee Harvey Oswald to offer his services to the Cuban consulate in Mexico City, and then (when rebuffed) to assassinate John F. Kennedy. Join us as we mine formerly guarded vaults and archives to tell this intriguing story in an unique way.

Informational programming.

Informational programming.

Informational programming.

Informational programming.

Mao was the 20th Century's answer to Napoleon: a brilliant tactician, a political and economic theorist, and a statesman who ruled a billion people for three decades. In death, he has become divine, worshiped as a god in a godless country. Considering who and what he ruled, Mao, with his Little Red Book, might just be the single most powerful human being who ever lived. We mine formerly guarded vaults and archives to reveal untold stories in a relentless search for the truth behind the legend.

Was life triggered by some event, like lightning hitting a pond full of amino acids? Earth was teeming with life billions of years before the dinosaurs existed. Single-celled organisms inundated the oceans, and the soil swarmed with living creatures. Where did it all come from and how do you go from a single-celled organism to a trillion-celled organism like Man? Cutting-edge science is testing out answers about life's origins and how life can be created on new worlds--or even our own.

They've discovered water on other planets, and snatched the actual building blocks of life from a comet's tail. But can space probes find a new Earth...and even make contact with alien life? In the 21st century, space probes are photographing, drilling and even sniffing new worlds in the quest for life, and scanning thousands of distant suns trying to detect Earth-like planets. It's only a matter of time before space probes unlock the secrets to extra-terrestrial life and the universe itself.