The History Channel

Ancient underwater cities can be found around the globe, but could these aquatic worlds be the ruins of unknown civilizations--or even proof of extraterrestrial visitations? The infamous tale of the long lost city of Atlantis may be a preserved memory of an ancient alien metropolis. Beneath Lake Titicaca in Peru, the ruins of recently discovered temples support local legends of an underwater UFO base. Ancient Indian texts, known as Sangams, describe sunken cities where aliens and humans intermingled thousands of years ago. Who could have built the 600-foot stepped stone structure off the coast of Japan--a site that may predate the Egyptian pyramids by thousands of years? Could evidence of ancient alien contact lie buried in Earth's deepest oceans?

Mysterious places can be found around the Earth, and, inexplicably, UFOs are often sited near these mystical areas. Planes and ships unaccountably disappear in the infamous Bermuda Triangle. Strange magnetic anomalies in Mexico's Zone of Silence have not only drawn missiles off their course, but seem to pull meteorites out of the sky. An ancient doorway carved into a sheer rock wall in Peru's Puerta de Hayu Marka is said to be a portal to other worlds. Markawasi's plateau is filled with strange rock formations allegedly left behind by an ancient advanced civilization. What connections do these and other "hot spots" share? Is it possible that ancient extraterrestrials also knew about these mysterious places?

There is evidence that suggests we experienced 20th century alien contact. In 1942, the Battle of Los Angeles involved the US military and Air Defense allegedly fighting a UFO. WWII Allied Air Force planes were buzzed by balls of light that some think could have been extraterrestrial. And the alleged crash of a flying saucer in Roswell, New Mexico in 1947 propelled the world into the age of UFOs. For decades, some people have been searching for the sounds of extraterrestrial intelligence, while others have been sending messages out into deep space. What would happen if aliens answered... or came calling? What protocols exist to determine who would speak on behalf of mankind, and how might we communicate? What happens if they return? Some believe they already have.

In 1947, ancient scrolls were discovered in desert caves near the Dead Sea. One of the texts, now called the War Scroll, spells out in chilling detail a future apocalyptic war that will end the world. Are modern events fulfilling the prophecy of The War Scroll? In fear of imminent death, the Qumran settlers hid the War Scroll along with other records of the Hebrew Bible. Soon afterward, they disappeared into the dust of history, leaving a grim prophecy of doom. Now, researchers explore the writings in the War Scroll and search our world for clues that the apocalypse foretold may be approaching. Visit the Dead Sea ruins--where it all began--to examine the cultural and spiritual conflicts in which the Dead Sea Scrolls were born. Experts point to an amazing coincidence of events that occurred then and that are happening now. Could ancient horrors herald a warning of terror today that could lead to our annihilation?

Less than 100 years after the birth of Christ, John the Apostle received a terrifying vision of Satan's final war against God--a horrific account of death and destruction that will bring about the end of human history. Heavy with symbolism, the prophecy describes a woman riding a monster with seven heads, and a Lamb releasing Four Horsemen that bring conquest, war, famine, and death. What has experts frightened is that many of the events that set the stage for Satan's rampage have already come true. Satan's wrath will be poured out upon the world in a series of cataclysms--earthquakes, pandemics, famine, and pestilence. What follows will be a massive battle with Satan's legion in a quest for world domination. All signs point to this occurring in our lifetime, a prophecy echoed by Nostradamus. Are we about to suffer the horrors of the Apocalypse?

Comets--these celestial travelers have forever filled us with fear and wonder. Lurking in the furthest reaches of our solar system, they come close to Earth as they orbit our Sun. Could something as destructive as comets hold the key to life? Are the building blocks of carbon-based life forms frozen inside? Might they contain information about the creation of our solar system? At the conclusion of two spectacular NASA missions that sent spaceships to rendezvous with these mysterious objects, we examine the scientific and historical record of comets, including man's reaction to them. Did a comet lead the Wise Men to Bethlehem? Did they foretell the death of kings, the destruction of civilizations? How did Halley's Comet provide Isaac Newton with the clues for his theories of gravity? Finally, what comprises this "dirty snowball" and how can we protect ourselves if headed on a collision-course with one?

Africa's Sahara Desert is the size of the United States, making it the largest desert in the world. It's also the hottest place on the planet. But now an astonishing series of geological discoveries has revealed this searing wasteland hides a dramatically different past. Scientists have unearthed the fossils of whales, freshwater shells and even ancient human settlements. All clues to a story that would alter the course of human evolution and culminate in biggest climate change event of the last 10,000 years.

Home to the legend of the Loch Ness Monster, this lake holds more water than any other lake in Britain. It's only 10,000 years old, but billions of years in the making. Trace the extraordinary story of Loch Ness: from the three billion year old bedrock of Northern Scotland, to the giant glaciers that carved out the Loch. On this incredible journey we reveal that Loch Ness was once part of America, giant dinosaurs, suspiciously similar to the fabled monster once roamed the area, and that the entire region was engulfed by huge volcanic eruptions as Scotland was ripped from its birth place on the American continent. Could the mythical Loch Ness monster be a descendant of the dinosaurs, somehow surviving in the murky waters of the loch?

Deep in the Rust Belt the white collar and blue collar divide has shaped our cities and our states. How did this rivalry change the way we all bring home the bacon?

It's a rivalry that tears us apart every four years, but how did our nation divide into red states vs. blue states, and what happens to the states caught in the middle?

Watch as a helicopter in Hawaii crashes and a huge man named Tiny lifts the 1,500 pound chopper by himself, enabling rescuers to pull the pilot out. When a gas tanker explodes on an Oklahoma freeway, area residents have their video camera rolling. In Ohio, the driver of a BMW flips over 13 times before coming to a crashing stop. Next a kayaker in France gets caught in a vicious torrent, turned upside down and cannot right the kayak. Cameras are rolling in the town of Punta Gorda, Florida as storm chasers are caught in the eye of Hurricane Charley. Finally a chariot race for fun turns disastrous as the chariot breaks, and the driver is catapulted 30 feet in the air.

Informational programming.

Informational programming.

Informational programming.

Informational programming.

From the shores of France and the jungles of Vietnam, to the treacherous mountains of Afghanistan and dusty streets of Iraq, soldiers, sailors, and Marines have been willing to make the ultimate sacrifice for their country. In this episode we explore the origins of military tattoos, from the ancient warriors of the Roman Empire to the Western sailors who brought ink to these shores. We hear from veterans and men currently serving, as they share their stories of combat and survival--and decode the ink that decorates their bodies.

In 1947, ancient scrolls were discovered in desert caves near the Dead Sea. One of the texts, now called the War Scroll, spells out in chilling detail a future apocalyptic war that will end the world. Are modern events fulfilling the prophecy of The War Scroll? In fear of imminent death, the Qumran settlers hid the War Scroll along with other records of the Hebrew Bible. Soon afterward, they disappeared into the dust of history, leaving a grim prophecy of doom. Now, researchers explore the writings in the War Scroll and search our world for clues that the apocalypse foretold may be approaching. Visit the Dead Sea ruins--where it all began--to examine the cultural and spiritual conflicts in which the Dead Sea Scrolls were born. Experts point to an amazing coincidence of events that occurred then and that are happening now. Could ancient horrors herald a warning of terror today that could lead to our annihilation?

Less than 100 years after the birth of Christ, John the Apostle received a terrifying vision of Satan's final war against God--a horrific account of death and destruction that will bring about the end of human history. Heavy with symbolism, the prophecy describes a woman riding a monster with seven heads, and a Lamb releasing Four Horsemen that bring conquest, war, famine, and death. What has experts frightened is that many of the events that set the stage for Satan's rampage have already come true. Satan's wrath will be poured out upon the world in a series of cataclysms--earthquakes, pandemics, famine, and pestilence. What follows will be a massive battle with Satan's legion in a quest for world domination. All signs point to this occurring in our lifetime, a prophecy echoed by Nostradamus. Are we about to suffer the horrors of the Apocalypse?

Comets--these celestial travelers have forever filled us with fear and wonder. Lurking in the furthest reaches of our solar system, they come close to Earth as they orbit our Sun. Could something as destructive as comets hold the key to life? Are the building blocks of carbon-based life forms frozen inside? Might they contain information about the creation of our solar system? At the conclusion of two spectacular NASA missions that sent spaceships to rendezvous with these mysterious objects, we examine the scientific and historical record of comets, including man's reaction to them. Did a comet lead the Wise Men to Bethlehem? Did they foretell the death of kings, the destruction of civilizations? How did Halley's Comet provide Isaac Newton with the clues for his theories of gravity? Finally, what comprises this "dirty snowball" and how can we protect ourselves if headed on a collision-course with one?