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Editorial

Nature 440, 2 (2 March 2006) | doi:10.1038/440002a; Published online 1 March 2006

Gradual force

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A delicate probe, twenty years old this week, has transformed our understanding of the nanoscale.

What difference can a breakthrough in science make over two decades? A quick comparison of the respective fates of two discoveries made twenty years ago reaffirms how daft it is to try to predict research outcomes over such a timescale.

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