Researchers say the reasons are complex, as due to the difficult making, such mechanisms were extremely rare and had great value. This explains the presence of this mechanism along with bronze statues aboard the sunken ship where it was found. Another feature indicates that it was almost impossible to repair the mechanism, which means a relatively short life and use of the material for other purposes afterwards. From the historical reasons, we can mention the fact that Greece was conquered by the Roman Empire and the stored knowledge subsequently passed into the Byzantine Empire, where, because of Christianity, it was not highly respected. After the fall of Byzantium, the engineering knowledge became the property of Arabs and only after the beginning of the Renaissance in Europe, it returned to the European civilization, along with the writings of Aristotle and other valuable knowledge.
Not all about the mechanism has been explained. The article makes it clear that, decade after decade, scientists continue to reveal more and more details about this ancient computer that, as an achievement, is equivalent to the laptop of our time, if not much more. Mysteries kindle the imagination of various researchers, giving rise to paleocontact theories associated with ancient history. These theories say that an extraterrestrial civilization that was much more advanced in its development had established contact with the ancient civilizations, sharing knowledge to the benefit of our predecessors. This knowledge led to qualitative leaps in human civilization. Definitely, the Antikythera Mechanism, with its complexity and mysteriousness, has become the subject of such theories. It is up to you to decide which of the theories seems the most plausible.