Ancient astronaut theorists suggest that aliens have been guiding mankind in secret to bring about huge leaps in technological advancement.
In recent years, more new evidence has been revealed than ever before that suggests there was extraterrestrial intervention on Earth in the distant past. Could we be at the tipping point where overwhelming evidence outweighs any last shred of doubt?
Investigating the theory that an ice-free Antarctica may have been colonised by extraterrestrials in the remote past, before a global catastrophe plunged it into an ice age.
Recent archaeological discoveries reveal just what life on Earth looked like in the remote past, but how could various hominid species have developed separately around the globe? Is mankind the result of an extraterrestrial experiment?
Exploring the pervasive concept of the 'Cosmic Egg', in which the universe or some other primordial being comes into existence by the hatching of an egg. Similar ideas occur in the creation myths of many cultures.
As we look forward to the first astronauts reaching Mars in the next 20 years, is there evidence to suggest human life was first seeded there?
As science turns towards augmenting humanity with technology, theorists suggest that we are merely following the path of our alien creators.
Ancient astronaut theorists look at the Aborigine mythos of Dreamtime, and ask if these stories hold the proof that aliens created life on Earth.
Could claims of 'The Nine' - a federation of extraterrestrial beings who monitor and influence mankind - have any substance? Some experts believe so.
Ancient astronaut theorists suggest that evidence of extraterrestrial visitation exists in every corner of the Earth, but some say the most compelling can be found in one of the world's least accessible places - China.
What if the Moon is not the natural object we believe it to be? Unidentified lunar objects in NASA photography may point to extra-terrestrial structures on the moon, and possibly evidence of what lies beneath the surface.
Russia is the home of 'cosmism', a belief that human civilisation originated in the cosmos and is destined to return to space. But many believe the rise of communism led to a wall of secrecy surrounding extraterrestrial contact in Russia.
The US military has long claimed that the 1947 Roswell crash was a weather balloon, but FBI files released in 2011 include a memo regarding the recovery of not one, but three 'flying saucers'. Could the US government have UFOs in their possession?
Thousands of people from every part of the world have reported being abducted by aliens. Could the alien abduction phenomenon be true? If so, why are people being taken? And, more importantly, why are they being returned?
Of all the Hindu gods, none is more important than Shiva, the destroyer. Theorists suggest this being that possessed incredible weapons and supernatural abilities may have been an extraterrestrial leader who came to Earth with advanced technology.