Ancient Aliens

Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode in this hit HISTORY series gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age-old debate. Did intelligent beings from outer space visit Earth thousands of years ago?

In 2017, a strange, cigar-shaped object entered our solar system from another star system traveling in such an unusual trajectory it caused some astronomers to suggest that it could be an extraterrestrial craft. It brought up an important question–will we have a plan in place for what to do if we encounter alien life?

Was Egypt home to Earth's earliest extraterrestrial visitors? 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.

Treasure hunter Marty Lagina and Ancient Astronaut theorist Giorgio A. Tsoukalos explore the bizarre statues, mysterious pyramids and gigantic structures left behind by one of the most mysterious cultures in the ancient world in Sardinia, Italy.

Millions of people around the world have claimed to be abducted by extraterrestrials. Are these extraordinary accounts some form of mass psychological delusion? Or, might these stories actually be true?

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?

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

Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode in this hit HISTORY series gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate. Did intelligent beings from outer space visit Earth thousands of years ago? In 2017, it was revealed that the Department of Defense recently spent millions investigating reports of UFOs.

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

In 2016, scientists made the astonishing discovery that 30 percent of all protein adaptations since humans’ divergence with chimpanzees have been driven by viruses. Could ancient aliens have shaped human evolution by introducing viral epidemics on Earth? And if so, for what purpose? Are they making us more like them?