Persistent claims and theories assert that the government's changing explanations and initial acknowledgment of a "flying disc" in the Roswell incident point to a deliberate effort to conceal potentially significant information.
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A ghost ship is found abandoned on a remote island that's home to one of the world's last uncontacted tribes.
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
A plane crash in the Everglades National Park leads to strange hauntings - and some believe the park may exert a dark, transformative power.
A strange series of events in Grand Canyon National Park leads researchers to speculate whether its power comes from forces that cannot be explained.
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?
Persistent claims and theories assert that the government's changing explanations and initial acknowledgment of a "flying disc" in the Roswell incident point to a deliberate effort to conceal potentially significant information.
Advances in technology have given us unprecedented access to distant galaxies that may harbour life. However, alien life may be found closer to home.
Alien encounters have offered a possible glimpse into the secrets of interstellar navigation. Could this one day ensure mankind's survival?
In October 2017, astronomers at the Pan-STARRS observatory saw something strange in our solar system: an object they named ‘Oumuamua', the very first observed visitor from interstellar space. This programme contains some flashing images.
While on patrol in Chechnyan forest, a Russian infantryman sees mysterious lights and fights an unknown presence that has a hypnotising effect. An intrepid Air Force engineer learns about evidence of UFOs at Wright Patterson Air Force Base.
US Navy Boatswain Mate, Robert Young, witnesses a strange green fog in the Bermuda triangle and experiences a spiritual warning that saves his life. Tech Sergeant Octavia Madden discovers her base house is haunted by the spirit of a little girl.
When a mysterious predator eats a shark, experts wonder if a prehistoric monster is to blame a sinister sight is caught on tape near Russia's Area 51 and the evidence might point to a cover-up.
A giant creature in an armor of ice is spotted in the Alaskan wild, and some suspect it's a deadly mythical monster a jet has a close encounter with an unknown object evidence of a deadly lightning strike invites paranormal explanations.
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.
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.
When a great white shark is killed, experts suspect a mysterious ocean monster and strange markings in the desert might be a tribute to an ancient spider god.
When a massive spider's web takes over a park, experts investigate if this monster's trap could capture a human. A tree spurts out thick red blood, and some believe it could be an undiscovered species of carnivorous plant.
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