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Intricate architecture

3D printing is enabling a return to intricate architecture of the kind not seen since the likes of the remarkable Gothic ceiling of King’s College, Cambridge, built in 1515. Using pink wax deposited by a nozzle on a robotic arm, the FreeFAB 3D printing system can cost-effectively make precise moulds and formwork to realise, in concrete, the complex designs that today’s architects can now readily achieve using modern software. There's more about this technology in an Economist article here.