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Other Chinese discoveries and inventions from the Medieval interval include block printing, movable sort printing, phosphorescent paint, countless energy chain drive and the clock escapement mechanism. The solid-fuel rocket was invented in China about 1150, almost 200 years after the invention of gunpowder (which acted as the rocket’s fuel). Decades before the West’s age of exploration, the Chinese emperors of the Ming Dynasty additionally Fashion & Online Shop News despatched large fleets on maritime voyages, some reaching Africa. This pioneering use of water energy constituted the primary human-devised motive force not to depend on muscle power . Several of the six basic easy machines had been invented in Mesopotamia. Mesopotamians have been credited with the invention of the wheel.