A new study has found that it costs energy to keep accurate time. Researchers built a simple clock and measured how accurate it was and how much energy it was consuming. Like any other engine, the clock released part of the energy supplied to it as heat. When the researchers supplied more energy, the clock became more accurate, but at the cost of releasing more heat...

http://researchstoryteller.com/espressoknowledge/accurate-clocks-consume-more-energy