One of the most compelling arguments for the Ancient Astronaut theory is the remarkable engineering evident in the construction of ancient megalithic sites worldwide. Join experts Giorgio Tsoukalos, William Henry, and Jason Martell as they embark on a global investigation, revisiting the series archives of Ancient Aliens to explore the most enigmatic archaeological sites, including Giza, Puma Punku, Nan Madol, Baalbek, and others.

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. Could this be true? Follow experts Giorgio Tsoukalos, William Henry, and Jason Martell as they sift through the series archives of Ancient Aliens to uncover in-depth descriptions and portrayals of these entities from Egyptian, Sumerian, Chinese, Mesoamerican, and Native American traditions.

Throughout history, legendary weaponry and advanced technologies have often been attributed to divine or extraterrestrial influences. Japanese swords were believed to be forged with the help of the supernatural, while mythical weapons granted by otherworldly beings were wielded by iconic figures like Joan of Arc and King Arthur. Even more intriguing is the evidence suggesting the existence of intelligent defense systems seemingly protecting Earth. Could all of these weapons have originated from... an alien arsenal?