Understanding the Inventions That Changed the World Episode 7, Waterwheels and Clocks Episode 7, Waterwheels and Clocks.

Streaming video - 2013

Turn now to two inventions that moved humanity from the ancient to the modern world. The waterwheel was the first major energy source beyond human muscle and animal labor, which freed people to perform more sophisticated tasks. Meanwhile, the development of the mechanical clock redefined our sense of time.