The History Channel

Reports of encounters with strange beings and sightings of mysterious objects in the sky have occurred throughout history. A 13th century historical book, Otia Imperialia, includes an account of a creature descending from a flying craft over Bristol, England. The log from Christopher Columbus' first voyage to America contains a report of strange lights in the sky. Medieval art pieces depict disc-shaped objects floating in the heavens. Sightings of flying cigar-shaped crafts were reported during the Black Plague. And there were even discussions of extraterrestrial life among America's Founding Fathers. Could these sightings, coming from every part of the world, from biblical times to present day, be evidence that aliens have been with us all along?

For thousands of years, pyramids were the largest structures on Earth. The best known were constructed in Egypt and Central America, but others have been found all around the world, including in China, Africa and Indonesia. But what purpose did the pyramids serve? Researchers explore strange similarities between all pyramids, as well as the geographic, strategic and otherworldly connections between these mysterious monumental structures.

Reveals for the first time the cockpit and control tower audio recordings of pilot and astronaut confrontations and sightings of unidentified flying objects high in our skies. From a detailed account of one of the very the first reported pilot case, the Arnold case in 1947, to recent recordings over New England and Texas, to NASA recordings and video from 2005, this special features interviews with pilots, witness and experts, including UCLA's Joseph Nagy, actor Ed Asner, and pilot/UFO researcher Don Berliner.

Newly declassified documents are providing the opportunity for a deeper investigation into whether governments around the world are engaged in a cover-up of UFO research. MysteryQuest's expedition and science teams travel to locations in the Nevada desert and in Utah to investigate. Using state of the art technology they investigate these covert US government sites looking for clues about what the government may know. And they experience just how much the government wants to keep its secrets when military helicopters and a fighter jet shadow the team on their trek near the base.

Clues to human extinction are discovered in the Dinosaur's apocalypse.

The lost city of Atlantis was said to be home to an advanced civilization that thrived almost 12,000 years ago. Some believe that those who lived in Atlantis may have been capable of space travel. But legend says the city disappeared suddenly and violently, swallowed by the ocean in a single day. For centuries, explorers and archaeologists have been trying to locate the submerged ruins of this legendary city. MysteryQuest's expedition team will reveal new sonar evidence of underwater structures discovered in the Atlantic Ocean. The team dives on these sites to retrieve samples and will use the latest technology and carbon dating analysis to explore whether they could be clues to uncovering the location of the lost city.

The officers of the SS, Hitler's feared paramilitary unit, were the most notorious war criminals of WWII. Some were brought to justice after the war, but many were able to escape from Germany. A massive secret organization known as Odessa was reportedly formed to help them flee and rebuild a new Reich that would again rise to power. MysteryQuest will investigate by following the path of feared Nazis from Germany, to Austria, and Italy. The team will also travel to Paraguay where many of the Nazis reportedly hid while plotting their new rise.

This island in the middle of San Francisco Bay has a forbidding reputation. Native Americans believed it to be a place of evil spirits. When it became a federal prison in 1934, only the most violent and difficult prisoners in the U.S. were sent there. It was reputed to be escape proof; only three men have ever managed to get off the island. They left in 1962 and have never been found. MysteryQuest investigates to determine whether they could have survived the icy waters of San Francisco Bay.

The ruler whose ego was as big as his empire declares himself dictator of Rome for life--turning his allies to enemies in the process.

This Mongol destroyer set in motion the conquest of a quarter of the world's population with a body count in the millions.

The king of Macedonia considered himself a god; his admirers called him a military genius; his enemies considered him the devil. He used weapons of mass destruction of his day to defeat his enemies. What drove his quest for world domination and led him to massacre tens of thousands, including women and children and members of his own family?

The fate of man's world of food. Destructive forces turn supermarkets into breeding grounds for insects and rodents. Some foods last forever. Da Vinci's The Last Supper suffers due to an unusual paint ingredient. Some of man's agricultural staples succumb, while a surprising plant thrives. Exquisite restaurants atop of Taipei 101, the second tallest building in the world, collapse.

Informational programming.

Informational programming.

Informational programming.

Informational programming.

How does forensic science help resolve questions about the JFK assassination? With the help of a group of scientists and researchers with access to the evidence in the case, EM Investigating History /EM  looks at new information that examines which theories are believable, and which are not. Specifically, the experts looked at the acoustic evidence from the radio of one of the motorcycle policemen in the motorcade and the number of shots that were fired; at the reliability of autopsy X-rays of JFK's skull; at the investigation that concluded that Oswald was the lone assassin; at the new evidentiary support for the "magic bullet" theory; and more.

Clues to human extinction are discovered in the Dinosaur's apocalypse.

The lost city of Atlantis was said to be home to an advanced civilization that thrived almost 12,000 years ago. Some believe that those who lived in Atlantis may have been capable of space travel. But legend says the city disappeared suddenly and violently, swallowed by the ocean in a single day. For centuries, explorers and archaeologists have been trying to locate the submerged ruins of this legendary city. MysteryQuest's expedition team will reveal new sonar evidence of underwater structures discovered in the Atlantic Ocean. The team dives on these sites to retrieve samples and will use the latest technology and carbon dating analysis to explore whether they could be clues to uncovering the location of the lost city.

The officers of the SS, Hitler's feared paramilitary unit, were the most notorious war criminals of WWII. Some were brought to justice after the war, but many were able to escape from Germany. A massive secret organization known as Odessa was reportedly formed to help them flee and rebuild a new Reich that would again rise to power. MysteryQuest will investigate by following the path of feared Nazis from Germany, to Austria, and Italy. The team will also travel to Paraguay where many of the Nazis reportedly hid while plotting their new rise.