Puma Punku in Bolivia features some of the largest stone blocks on Earth, each carved with incredible precision. But the blocks lie scattered across the landscape, baffling archaeologists as to what the ancient site might have been. Could new advancements in technology help to solve a centuries old puzzle–and offer proof of alien intervention on Earth?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Throughout ancient cultures there are stories of god-like beings providing instruction to early humans, helping our ancestors to establish the first civilizations and teaching them in various disciplines. Could it be true? And do mysterious figures who appear throughout history provide evidence that these otherworldly teachers have been with us all along?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Ancient Aliens is counting down ten of the most intriguing–and mysterious–symbols and codes found across the globe that just might contain proof of otherworldly contact. From glyphs in the Peruvian desert, to spiral petroglyphs embedded with advanced math, and a language with an otherworldly origin, could these codes unlock the secrets of our extraterrestrial past?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Deep beneath the sands of Egypt lie 24 enormous sarcophagi–and every one of them is empty. What purpose might these giant tombs have served? And is it possible that the perfectly carved stone boxes–each weighing more than 70 tons–were designed not by humans… but by otherworldly visitors?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Throughout the world there are mysterious ancient stones shaped into perfect spheres. Many of them show clear evidence of being manmade and some completely defy explanation. Could the mystery of the stone spheres provide clues about humankind’s alien past?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

For thousands of years, humankind has attempted to make contact with beings from beyond Earth. Now, in the 21st century, the search for extraterrestrial intelligence is ramping up like never before, with powerful new technologies allowing us to explore billions of stars across the universe. Are we on the verge of first contact?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Did a biblical patriarch receive instructions from 200 angels high above the earth? Were the ancient Greeks taught how to work metal by a race of fish-people? And might Egypt’s most controversial Pharoah have been an extraterrestrial being? Giorgio Tsoukalos looks at mysterious teachers who have appeared throughout history–and reveals The Top Ten Alien Influencers who he believes provide the ultimate proof of extraterrestrial contact.

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Dr. Jacques Vallee holds multiple scientific degrees, is a best-selling author, and is one of the fathers of the internet. But he is best known for his revolutionary work in the field of UFOs, and his bold theories challenge our notions of alien life. Will Dr. Vallee’s incredible work soon lead to answers about what has been happening in our skies for thousands of years?

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.