Is it possible that intelligent life forms visited Earth thousands of years ago, bringing with them technology that drastically affected the course of history and man s own development? Presented in the 1968 bestselling book Chariots of the Gods by Erich von Daniken, the theory of ancient aliens rocked people s beliefs in mankind s progress. Ancient cave drawings of strange creatures, remains of landing strips in Peru, and Indian texts that describe the flying machines of the gods were just a few of the odd archaeological artifacts cited by von Daniken as proof that .