Witness unexplained shapes in the deserts of Genghis Khan, see the mystery fleet of ice planes at the end of the Earth and look down at Kim Jong Un's terror factory from space.
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Strange lights are reported by security near the East Gate of RAF Woodbridge, a US Air Force base on England's east coast. But could extra-terrestrial visitors be to blame?
An exploration into the origins of humans' complex and fascinating relationship with the skies, from the earliest ancestors to the birth of science.
Discover the key role scientific pioneers played in reshaping our solar system. Plus, learn how developing new technology helped humans explore its furthest reaches.
Rob and Shelley Hartland believe they live under a UFO super highway. Meanwhile, Peter Khoury claims he experienced a close encounter - of the sexual kind.
A police officer is on patrol when he suddenly hears a loud roar in the distance and sees a flame rising into the air. As he gets close he spots an oval-shaped object lifting off.
George is driving his vehicle near a lagoon on his neighbour's property when he hears a loud hissing sound. Suddenly an unexplained saucer-shaped object rises out of the swamp.
Ordinary people across the US are encountering something that bears a startling similarity to Werewolves. Are these creatures something more than myth?
There are three types of close encounters with aliens, sightings, fleeting interactions, and the third kind where aliens take humans for extended periods. We look at instances of all three and meet real people who have experienced them.
From military radar to Navy aircraft, sightings of Unidentified Aerial Phenomena have become more frequent - leading to unprecedented acceptance of alien contact.
Experts investigate evidence suggesting that aliens have created the means for controlling humanity. They find that the shocking truth might be hidden right inside you.
Deep sea explorers discover an unknown monster thousands of feet beneath the ocean killer fog threatens a town in the American Midwest a truck spontaneously explodes on a busy freeway.
Near Area 51, a police convoy is filmed transporting an alien-looking craft in the dead of night when strange beams of light are reported in Argentina, experts investigate if it's proof of a terrifying Nazi superweapon
Discover the link between Nazis in New Mexico and a mystery craft in Roswell, explore Australia's underground labyrinthine abyss and decode the cypher of Atomic Island.
Witness unexplained shapes in the deserts of Genghis Khan, see the mystery fleet of ice planes at the end of the Earth and look down at Kim Jong Un's terror factory from space.
With light from distant stars taking millions of years to reach us, how long might it take for alien life to answer any communication sent into space?
Certain structures on our planet have stood the test of time and continue to astonish mankind. So much so, that alien intervention in their construction thousands of years ago, has yet to be ruled out.
Those in power have secrets they do not want average citizens to know.
Discover doorways to wormholes in time, their secret locations around the world, as well as who is trying to open them and why.
Previously sealed documents hint at compelling new theories about extraterrestrials. Could aliens be living among us? And could former US Presidents know something we don't?
Experts investigate why so many UFO sightings take place in Los Angeles, determining that the answer may lie underwater.
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