Ancient Aliens

After peculiar steel spheres appear in Vietnam, theorists trace the history of mysterious metals, from religious artworks to the lost city of Atlantis.

Theorists speculate that a quiet estate in the English countryside is actually a secret government facility holding intelligence relating to alien life.

From pyramids to temples, past civilizations built structures with such similarities that some experts are sure that only aliens could be the architects.

Ancient-astronaut theorists investigate whether curses linked to the Ark of the Covenant and King Tut's tomb could be extraterrestrial technologies.

Elongated skulls, 100-million-year-old tools and suspected forgeries contradict established records and prompt questions about unknown ancient cultures.

Theories of an alien society in the ancient city of Teotihuacán arise after excavations find underground pools of mercury and unusual gold orbs.

With megalithic sites around the world emitting identical frequencies, researchers study the role of sound and its significance in ancient structures.

A leaked memo ignites an investigation into the "Majestic Twelve," a supposed top-secret US government cabal tasked with covering up alien contact.

Using traditional wisdom and modern scientific techniques, theorists try to decipher the Akashic records, a nonphysical repository of cosmic knowledge.

Details in ancient Sanskrit writing appear to predict modern technological advances — could alien visitors have influenced the authors of these texts?