Revisit the most compelling mysteries explored over the past 15 years of "Ancient Aliens." Experts like Giorgio Tsoukalos, David Childress, William Henry, and Jason Martell engage in conversations around Ancient Astronaut Theory in each episode.
One of the most compelling arguments for the Ancient Astronaut theory is the remarkable engineering evident in the construction of ancient megalithic sites worldwide.
Compelling evidence of ancient flying machines is found in cultures across the globe. The Saqqara Bird, an artifact from ancient Egypt on display at the Cairo Museum, strikingly resembles modern aircraft.
Are we truly alone in the Universe? Ancient Astronaut theorists propose that descriptions of sky gods and star beings might reflect real encounters with extraterrestrial visitors in the remote past.
Based solely on Charles Darwin's Theory of Evolution, the rapid development of modern humans seems impossible without a 'missing link.' Could this link involve extraterrestrial intervention?
Beneath the surface of China lies the Longyou Grottoes, a breathtaking subterranean marvel. Might this location, and others, validate ancient legends of underground realms inhabited by extraterrestrial beings?
Ancient sites like Stonehenge, Newgrange, and Egypt's Pyramids of Giza reveal astonishing celestial alignments that seem far from coincidence. What purpose do they serve?
The Ark of the Covenant has inspired awe for centuries. It was said to have wielded extraordinary powers--creating food, collapsing walls, and communicating directly with God. Could the Ark have been an advanced technological device?
Earth's deep, uncharted waters have long been a source of wonder and speculation about what lies beneath. Might these point to an otherworldly presence lurking in Earth's watery depths?