On the Antikythera Mechanism website, provide a concise summary of the mechanism, including its primary function, when and how it was discovered, and what makes it historically significant according to the homepage.
Navigate to antikythera-mechanism.gr. Read the content on the homepage to identify the primary function of the mechanism. Locate the details regarding its discovery, including the year and how it was found. Extract information explaining the historical significance and unique nature of the mechanism. Synthesize all gathered information into a concise answer.
State that the primary function is to predict astronomical positions and eclipses for calendar and astrological purposes. Identify the discovery year as 1901 and mention it was found by sponge divers. Explain that its historical significance stems from its complexity and accuracy being far ahead of its time, challenging conventional views of ancient Greek technological capabilities, and being the most complex known ancient device. Confirm that all information was obtained solely from the homepage.