His big machine takes five days to assemble with a crew of 10, builders and performers all of them.

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The method requires a series of advanced laboratory procedures, microarray chips and a high-speed gene-sequencing machine to assemble the strands in the proper order, correct any errors and then read the final text.

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The makers would have to produce a mould, cast the head, machine it to a suitable finish, turn a wooden handle and then assemble the parts.

ECONOMIST: A third industrial revolution | The