Smallest puzzle in the world

[unable to retrieve full-text content]Researchers have created three puzzle pieces of less than 1 mm in size each that may be put together to make what is likely the smallest puzzle in the world. For production, researchers used a new process to manufacture microstructured casting molds. Inexpensive series production is combined with highest precision on the microscale to produce such things as components for watches, engines, or medical products. Now, large series of smallest parts can be injection-molded with the highest accuracy.?

Source: http://feeds.sciencedaily.com/~r/sciencedaily/~3/eRZhYSVfAZ4/130715070304.htm

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