Could an exotic super heavy element provide the key to humanity's future in the stars? According to physicist Bob Lazar, "Element 115" is the fuel source for an alien spacecraft he was hired to reverse-engineer by the U.S. government.

When Spanish Conquistadors obliterated the historical record of the Maya in the 16th century, did they wipe out evidence that ancient people traveled to the Americas from all over the world--and in flying craft provided by extraterrestrial visitors?

Some 2,600 years ago, the most sacred relic of the ancient world suddenly disappeared from history: The Ark of the Covenant. Could descriptions of the Ark's incredible power reveal that it was a highly advanced technological device?

Since 2017, the Navy has been releasing photos and videos of Unidentified Aerial Phenomena--and Ancient Astronaut Theorists suggest the incredible images are nearly identical to accounts from centuries ago.

Throughout the world, ancient rites and rituals are believed to connect humans to another dimension. But just who--or what--are we communicating with? Could man's attempts to emulate ancient alien visitors?

Scientists are continually challenged by unidentified strains of bacteria with mysterious origins. Could some of our most crippling plagues and epidemics be traced to the darkest voids of space--or even extraterrestrial intervention?

All over the world there are megalithic stone structures whose construction baffle stonecutters, scientists and archeologists. Is it possible that ancient humans managed to move and cut these gigantic rocks with the help of alien technology? From the 3,000 megalithic stones in the French village of Carnac to the precision-cut blocks at Puma Punku in Peru to the 12,000 year-old circular structures of Gobekli Tepe, carved multi-ton megaliths are found...

Throughout the ancient world, structures were built to mirror the constellations in the night sky--and, in most cases, this is only apparent when they are viewed from high above the Earth.

Giorgio Tsoukalos takes a look back at the most incredible evidence ever uncovered that could offer definitive proof that we are not alone in the universe.

It is one of the greatest mysteries of the prehistoric world: why did people on nearly every continent erect giant standing stones?