Analyzing historical and archaeological evidence, Philip Coppens demonstrates that there is substantial proof that our ancestors were far more technologically advanced than in currently accepted, and that certain cultures interacted with non-human intelligences. Our ancestors were clearly not alone. Have we been visited by extraterrestrial beings? Did these "ancient aliens" contribute to the birth of human civilization? Do our ancient monuments contain evidence of their presence? Fifty years after Erich von Däniken posed these questions in Chariots of the Gods, Coppens provides clear, concise answers to the great historical enigmas in an accessible, readable format. This new edition features a preface by Kathleen McGowan, along with a new afterword that is the last essay Philip Coppens wrote.