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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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?
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.
A mysterious flame appears in the Norwegian wilderness with the fury of the Viking god Thor video footage shows a ghostly figure stalking people in Japan, providing evidence for the truth of a local legend.
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.
Over two nights, a silent, orange football-shaped object is spotted near the nuclear weapons storage site at Loring Air Force Base in Maine. Could alien visitors be to blame?
Strange lights are reported by security near the East Gate of RAF Woodbridge, a US Air Force base on England's east coast. But could extra-terrestrial visitors be to blame?
Human remains are discovered high in the Ecuadorian Andes. In Norway, an archaeology student unearths metal artefacts. A strange earthquake-like event is investigated in Canada. In Greenland, a Viking longhouse with a unique history is found.
A grim discovery in a Swedish lake reveals shocking ancient practices. In the Canadian Arctic, the fossil of a previously unknown mammal is found. Bizarre ice formations in the Antarctic Ocean are investigated.
The evidence for Bigfoot piles up, causing some to wonder who has been keeping information from the public.
Disturbing experiments in animal cloning go on behind closed doors and human cloning may soon be a reality.
Ron Johnson, 16, is feeding the family sheep when he suddenly sees a mushroom-shaped object appearing in the field emitting a blinding light. Could it be a UFO?
It's 11am at the Westall School in Melbourne, Australia when a classroom of students playing outside see a saucer-shaped object in an adjacent field. But could it be aliens?
The US government officially recognise UFOs, calling them Unidentified Aerial Phenomena. In this episode Craig and Sarah take on the US Navy UAP videos. They speak to an ex-MOD official, Nick Pope. This programme contains some flashing images.
A fascinating look at the mounting evidence that suggests UFO waves are able to penetrate the world's most closely guarded airspace at will.
From mid-air abductions to near-disasters caused by unseen enemies, experts examine if we are alone in the skies over Earth.
Adam, Gwen and Julie recall personal encounters with UFOs, before experts' theories are put in doubt when we learn that each individual has time missing from their encounters.
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.
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