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Published online 27 March 2001 | Nature | doi:10.1038/news010329-8
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Liquid logic
Microscopic channels carved in plastic perform maths with flowing water.
A postage-stamp-sized network of wells and drains has solved a mathematical problem that would tax a computer1.
George Whitesides of Harvard University and colleagues have turned water-power on an 'NP complete problem' -- a mathematician's worst headache.
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