The Antikythera mechanism, a type of analogous computer working with a differential gear, and the astrolabe each present great refinement in astronomical science. Innovations in mechanical technology included the newly devised right-angled gear, which would turn into particularly essential to the operation of mechanical gadgets. Hellenistic engineers also devised automata corresponding to suspended ink pots, automatic washstands, and doorways, primarily as toys, which however featured new useful mechanisms such as the cam and gimbals. In music, the water organ, invented by Ctesibius and subsequently improved, constituted the earliest occasion of a keyboard instrument. In time-keeping, the introduction of the inflow clepsydra and its mechanization by the dial and pointer, the application of a feedback system and the escapement mechanism far outdated the earlier outflow clepsydra.

Stone Age cultures developed music and engaged in organized warfare. The later Stone Age, during which the rudiments of agricultural technology have been developed, known …