Humanoid robots are rapidly reaching a level of sophistication that was thought to exist only in science fiction. But is the obsession with creating counterfeit humans really pointing the way to mankind's future - or to its past?

Is it possible that an advanced civilization inhabited Earth thousands of years ago? Could the stories of a time when gods and otherworldly beings inhabited the planet be more than just mythology?

Did aerospace engineer Wernher von Braun have secrets collected by the Nazis in WWII, or access to technology recovered from Roswell? Is it possible that the world's greatest rocket scientist found his inspiration not on our world, but another?

In nearly every culture there are stories of opposing forces at work here on Earth - forces of a supernatural or otherworldly nature. Could these forces really exist? And if so, what is the true nature of the dark forces?

Ancient astronaut theorists have suggested that many of the divine beings depicted in cultures throughout the world are not really divine - or mythological - but instead reflect extraterrestrial visitations that our ancestors did not understand.

Since the launch of the Kepler Telescope in 2009, scientists have identified thousands of planets capable of supporting life. Is it possible that this discovery could finally answer the age-old question: are we alone in the universe?

In August of 2014, Russian cosmonauts aboard the International Space Station discovered something incredibly unexpected covering parts of the windows - living sea plankton. If sea life can thrive in space, might the reverse be true as well?

Ancient Aliens examines 75 million years of the most credible alien evidence here on Earth, from the age of the dinosaurs to ancient Egypt to the skies over the western desert in present day USA.

Might the United States military really have a secret space programme? And if so, are we preparing for a space-based war with other nations... or other species?

In Iraq and Syria, thousands of ancient artifacts and relics have been deliberately destroyed. In the highlands of Tibet and the jungles of Central America, sacred texts have been systematically destroyed. Could this all be by design?