Exploring some of the most extraordinary UFO cases of recent times, revealing new details behind hidden secrets, suppressed evidence and cover-ups.
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A strange mountain in Egypt sparks an investigation into Cleopatra's gems and the tomb of Alexander the Great.
In Russia, 34,000-year-old graves are discovered. A team attempts to locate a World War II British plane that went missing in Iceland. Fossils are found in an Alaskan riverbank. In Antarctica an undiscovered depression in the ice is investigated.
A volcanic island off the coast of Antarctica with a mysterious past is explored. In the Peruvian Andes, the mummified remains of a teenage girl are discovered. A shipwreck is found near Russia's Franz Josef Archipelago.
If technology goes too far, too fast, a time may come when humans are no longer at the top of the evolutionary food chain.
Every culture and religion on the planet believes that an evil one will usher in the end of days. But who is this Anti-Christ? And how can we hope to stop him?
A huge structure high above the rainforest in Sri Lanka is investigated. Over 300 stone spheres are found in Costa Rica. In Mexico, the strange remains of a small man are discovered. A fossil unlike any known animal is uncovered in Madagascar.
In Columbia, a massive animal vertebra is found. Dozens of jars packed with bones are discovered in Cambodia. On Peleliu Island a strange, rusted vehicle is discovered in the jungle. Trees that appear to be moving are investigated in Ecuador.
Uncover new evidence pointing to the possibility that ancient man was visited by extraterrestrials, influencing architecture, art and more.
When it comes to identifying mysterious objects in our skies, few people are more qualified than pilots and astronauts - but are sightings common?
A look at dolphin rescues, death-smelling pets and a skinny teen with unbelievable strength.
Did San Francisco's sea lions sense an impending disaster, what are the secrets of a mysterious medieval manuscript, and why do mummies in Egypt contain cocaine from Peru?
A homeowner is left bruised when she's caught in the crossfire between two spirits and a pair of ghosts outraged at a couple's lifestyle become violent.
Wendy and Glenn Laycock move into a new home, only to find that a previous owner hasn't moved out. Meanwhile, a home built on the site of a terrible tragedy is haunted by its past.
Check out mind-reading plants, pagan human sacrifice and Californian time travellers.
A look at Death Valley boulders, mysterious dancing lights and super-marathon runners.
While hunting in Idaho, two brothers witness something extraordinary that defies explanation. Plus, a strange metal craft passes over Antananarivo, Madagascar.
A wave of sightings in Colares, Brazil, causes mass panic with people fleeing the island. In Australia, a flying object causes a severe headache for a farmer.
A strange forest of razor-sharp stones could be home of an undiscovered Hobbit-like humanoid species. When a man-made island mysteriously appears off the US coast, grisly new evidence points to secret government experiments into psycho-chemical warfare.
A giant naval vessel is located on the bottom of the Norwegian Sea. An ancient reptile-like creature unknown to science is found in the permafrost of Canada's Arctic. In Scotland, archaeologists are drawn to a strange, figure-eight shaped ditch.
A secret military base is discovered a few hundred miles from the North Pole. A man-made, ancient stone formation is found 120 feet below the surface of Lake Huron. A 1500 year old burial ground is discovered on the shores of the Baltic Sea.
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