A device so complicated that “if it had not been discovered in 1901, no-one would have believed it possible” — this is the finding of a (relatively) new study of the famous Antikythera mechanism, dating from 150 BC. Found by chance by sponge divers in the wreck of a Roman vessel off the Greek island of Antikythera, it was at first presumed to be the inner workings of a sophisticated clock...