How to Make a Clock Run for 10,000 Years

High on a rocky ridge in the desert, nestled among the brush, is the topmost part of a clock that has been ticking for thousands of years. It looks out over the ruins of a spaceport, built by a rich man whose name was forgotten long ago. Most of the clock is deep inside the mountain, below [...]

Source: http://www.wired.com/gadgetlab/2011/06/10000-year-clock/

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