This ancient calculator is unbelievable. Second century B.C.!
Dr. Charette noted that more than 1,000 years elapsed before instruments of such complexity are known to have re-emerged. A few artifacts and some Arabic texts suggest that simpler geared calendrical devices had existed, particularly in Baghdad around A.D. 900.
Somebody I know once claimed, only half in jest, that if it wasn’t for the Dark Ages we’d have landed on the moon by like 1200. Big ol’ imperial space-galleys or something.