Aldo diSorbo was the first European to promote the 'god-astronauts' theory. He believes that the human kind is an 'experiment' of extraterrestrial communities. They govern the world, the rules of mechanics, the way in which the species reproduces itself and so on. During the last decades, Aldo diSorbo has gathered an incredible number of followers, but also a lot of critics. His theory is better defined in his latest book, but still, his first ones remains the wide-spreaded work.