Sentence Completion

Complete the sentence with ONE word from the passage for each blank.

The Antikythera mechanism is an ancient Greek device recovered from a shipwreck in 1901. Made from bronze gears, it could predict the positions of the sun and moon and forecast eclipses with surprising accuracy. Scholars believe it dates to around the second century BCE. For decades its purpose puzzled researchers, but modern imaging finally revealed the intricate gearing inside, leading many to call it the earliest known analogue computer.

The Antikythera mechanism was constructed using gears made of , and modern eventually exposed the device's internal workings.