This metal sphere is just seven hundredths of an inch across, no bigger than the head of a pin. Yet under extreme magnification it shows two holes that have been precision drilled through it. Each one is just four times the width of a human hair.
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Witness a prehistoric ghost in Ireland, a machine that can see back in time and a giant pentagram in the Canadian snow.
Baffling stories of people who disappeared without a trace: off the coast of Australia, three men mysteriously vanish from a yacht and the theories of what may have happened to them prove even stranger.
Three incredible stories about the predictive power of the sub-conscious: an Ohio man warns of a horrific plane crash before it happens a seven-year-old senses imminent disaster a California man predicts 9/11 and hurricane Katrina.
One of the world's best UFO hotspots is very close to home. Craig and Sarah examine the Scottish UFO phenomena — a myriad of extraordinary cases, including the 1991 sighting of a glowing red disc. This programme contains some flashing images.
This metal sphere is just seven hundredths of an inch across, no bigger than the head of a pin. Yet under extreme magnification it shows two holes that have been precision drilled through it. Each one is just four times the width of a human hair.
150 years ago a strange set of objects are found in the Great Pyramid at Giza. A piece of cedar wood with regular marks etched along its length, a two-pronged bronze hook with two pins sticking into it, and a baseball-sized sphere made of granite.
Experts open previously off-limits files in a bid to answer some of the most mysterious questions surrounding UFOs and extra-terrestrial life.
A look at the possibility that life began on Mars and travelled to Earth. Plus, if aliens exist, what plans do they have in store for us? Experts investigate.
Satellites reveal a series of strange pits in central China. What are they and what is their connection to some of the most pivotal events in the country's history?
Florida's vast Everglades have been invaded by up to 300,000 giant pythons. A group of military veterans are battling to rid paradise of these monsters.
A journey to the depths of the Black Sea yields the greatest series of ancient shipwrecks ever discovered. This documentary captures a series of astonishing discoveries made a treasure trove of shipwrecks uniquely preserved that date back two and a half thousand years to the Greek and Roman empires, culminating in maritime archaeology's greatest ever wreck. A fully intact Roman wreck, perfectly preserved in the anoxic waters of the Black Sea.
A journey to the depths of the Black Sea yields the greatest series of ancient shipwrecks ever discovered. This documentary captures a series of astonishing discoveries made a treasure trove of shipwrecks uniquely preserved that date back two and a half thousand years to the Greek and Roman empires, culminating in maritime archaeology's greatest ever wreck. A fully intact Roman wreck, perfectly preserved in the anoxic waters of the Black Sea.
A strange, eerily colourful ocean seen from space conceals a terrible secret - its waters are killing all sea life in and around it. What is causing this 7,000 square mile dead zone?
Eyes in the sky uncover something disturbing in Alaska - a settlement large enough to house thousands of people, wiped out by artillery and bombs. What happened here?
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.
Explore a shipwreck found in the middle of the desert, learn about the German aerial terror of WW1 and traverse through a ghost town still stalked by a serial killer.
Three extraordinary stories about the supersensory power of animals: in Germany, a seemingly psychic octopus correctly predicts multiple winners in the 2010 soccer World Cup.
Three stories that suggest aliens are among us: a Mexican rancher slays a terrifying and mysterious creature that's genetically unlike any species on Earth, and is later burned to death in his car.
Over the past 50 years a fascinating pattern has emerged, linking UFOs with military personnel and installations. One of the most significant of these events took place on British soil in 1980. This programme contains some flashing images.
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