Ancient Aliens

Researchers claim there are hidden messages that can be found within the works of Leonardo da Vinci - and other art throughout history - that may reveal an extraterrestrial influence.

Could giant ancient drawings found etched into the desert floor be part of an ancient alien code?

Could Area 51's notoriety act as a cover up to much bigger, top-secret extraterrestrial experiments taking place at multiple locations?

Ancient Astronaut theorist Giorgio A. Tsoukalos explores the latest scientific discoveries at some of the world's most ancient places to find evidence that extraterrestrials visited Egypt in the distant past.

Could the ancient ruins of Sardinia hold clues to an extraterrestrial past? Marty Lagina and Giorgio A. Tsoukalos explore bizarre statues, mysterious pyramids and gigantic structures left by one of the most mysterious cultures in the ancient world.

Seven stone giants stand guard over a Pacific island. But what are they protecting – and from whom? Ancient Astronaut theorists Giorgio A Tsoukalos and David H Childress explore a Polynesian land of bizarre figures and forbidden places.

A secret alliance hidden in plain sight. Joint space missions with undisclosed agendas. Have the United States and Russia been working together from the very beginning of the Space Race - in preparation for the ultimate extraterrestrial encounter?

Ancient cultures from around the world believed that meteorites were sacred stones imbued with the power of the Gods. Ancient Astronaut theorists ask: could these space rocks be pieces of extraterrestrial technology?

Are intelligent robots a threat to humanity - or the next step in human evolution? As man and machine begin to merge, are we fulfilling a destiny prepared for us by aliens thousands of years ago?

Erich von Däniken's Chariots of the Gods? challenged everything we thought we knew about mankind's history, suggesting that aliens visited Earth in the distant past. Fifty years after the book's publication, is he about to be proven right?

As humanity prepares to establish colonies beyond Earth, are we simply realising mankind's future or returning to its extraterrestrial past? And when humans become the alien visitors on other planets, what - or who - will we encounter?