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.
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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.
In Mexico, dozens of skulls and bones are found on a cave floor. Strange grass covered domes are investigated in the Philippines. Carved stone figures are discovered in Hawaii. In Peru, a tiny silk structure stumps researchers.
In the Solomon Islands, a strange cave is explored. Two skulls from an unknown animal are found in Vietnam. In South Africa, ancient human remains are found in an unexpected place. An old truck is discovered in the dense Guyanese jungle.
Are UFO sightings at Joshua Tree linked to an anti-aging machine and a powerful creature called the Yucca Man?
The Hawaii Volcanoes National Park is the site of strange events. Are they linked to the legendary Native Hawaiian Goddess of the Volcano, Pele?
From inexplicable disappearances to mysterious experiments, events in Mount Shasta National Park may be explained by an ancient Karuk Indian legend.
In Montana's Glacier National Park, some claim that there is a hidden underground Nazi base that may even have been the final hideout for Hitler himself.
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.
As humanity continues to search for alien life, experts give their analysis on how close we are to first contact.
Is biological life merely a stepping stone for a universe dominated by alien artificial intelligence?
Trouble on the border – a UFO is captured on camera. Is it being used for smuggling by wealthy drug gangs, or is there a less earthly explanation? A woman is filmed as she disappears from her bed – is she being abducted by aliens as she claims?
For decades, extraterrestrial research has been directed to the skies - but researchers believe that UFOs may also be inhabiting our oceans.
Few have ever heard of the top-secret base in the deserts of Utah known as Area 52, but reports of UFOs have convinced people that the US military is keeping secrets.
When a river of blood washes through a city's streets, some witnesses believe it's a warning of doomsday a strange, perfect circle emerges in the clouds about California, with some experts speculating that it's evidence of alien activity.
Evidence of ghostly apparitions at a Civil War battlefield when mysterious blue fires start near Yellowstone, experts worry if a supervolcano eruption is imminent near the site of the Salem Witch Trials, an eerie spectacle stuns scientists.
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?
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.
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.
Hundreds of bones are found in a reservoir in Guatemala. In Oman, a strange weather pattern is discovered. Giant animal bones in Australia puzzle researchers. On an island off Tanzania, a huge stone structure is revealed.
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