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Two‐Photon Polymerization
In article number 2204072 by Andrew Kellett and co‐workers, a series of two‐photon printed microstructures used in optical, drug delivery, tissue engineering, and microfluidic devices are placed on the columns of the Giant‐s Causeway, which is a natural phenomenon of interlocking basalt columns that resulted from ancient volcanic activity on the coast of county Antrim, Ireland.
