What On Earth?
When a mysterious circular stone structure is discovered in Scotland, experts investigate whether it's the fabled Round Table of King Arthur.
When a mysterious circular stone structure is discovered in Scotland, experts investigate whether it's the fabled Round Table of King Arthur.
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When a mysterious circular stone structure is discovered in Scotland, experts investigate whether it's the fabled Round Table of King Arthur.
A Kazakh farmer discovers ancient burial sites that may determine whether or not the legend of the Amazon women warriors is myth or reality. In the Italian Alps, a group of hikers explore long forgotten military infrastructure.
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.
Farmer Edwin Fuhr is harvesting crops when he spots a stainless steel metal object hovering in his field. Suddenly, four identical objects appear, but could aliens be to blame?
Discover doorways to wormholes in time, their secret locations around the world, as well as who is trying to open them and why.
In the Philippines, researchers find ancient Rhino bones. Near the Columbia-Panama border, an old car is discovered in the jungle. A Brazilian island is infested with thousands of deadly snakes. In Kenya, human remains are found deep in a cave.
A hidden ancient city is found in Micronesia. In New Guinea, an airplane wreck is investigated. A strange glowing forest is discovered in India. An immense tunnel system in the Brazilian jungle is explored.
Many believe that extraterrestrial secrets are not just limited to the military - so could deathbed confessions provide evidence of the existence of UFOs?
From the lore and history of ancient Egypt to the myths of Native Americans, mankind's past is riddled with the evidence of UFOs.
Laura Sinclair is walking her dog when she sees a large cylindrical object hovering in the sky. Plus, school children in Florida witness multiple UFO sightings.
When satellites capture a massive crater in the picturesque English countryside, historian Martin Morgan heads there to investigate.
A shipwreck in Lake Michigan has an incredible history. How did this vessel, once part of Hitler's push to win World War II, end up stranded in one of the Great Lakes?
Paranoia spirals out of control as the demonic force terrorising Salem Village grows. Suspected witches are jailed and the accused face execution if found guilty.
An inexplicable evil torments the young girls of Reverend Samuel Parris' household before spreading through Salem. The afflicted make witchcraft accusations.
When satellites capture a strange oozing grey mass in the Mississippi countryside, scientist Nick Pollock goes to investigate.
A perplexing, intricate symbol high up in the remote Peruvian Andes may be for the grisliest of child sacrifices - death by lightning strike.
On Halloween night in 2004, the police receive over 50 UFO reports in the Chicago area. Plus, in Bucks County, a contractor sees a large object pass over his home.
In Michigan, a father and son see strange lights and call the sheriff's office. In France, a bizarre phenomenon called 'Angel Hair' is spotted hovering over school grounds.
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.
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