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Scientists Create World's Smallest Steam Engine 84

First time accepted submitter Virtucon writes "German physicists say they've built a heat engine measuring only a few micrometers across which works as well as a normal-sized version — although it sputters, they admit. Researchers at the University of Stuttgart and the Max Planck Institute for Intelligent Systems say that the engine does basically work, meaning there's nothing, in principle, to prevent the construction of highly efficient, small heat engines."

If it's worth doing, it's worth doing for money.