Then buttons are pressed and seven printing plants around the world receive an identical issue, together with all its sophisticated colour pages.

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One, inevitably, is the double vision: two sets of eyes, often from two identical faces, staring out at the world together.

ECONOMIST: Double vision

For the number of identical Bob Marley posters hanging on walls at this moment, maybe the world needs a bit more access to unique artwork.

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The line-up this year consists of ten identical 68-foot long yachts -- all sponsored by different cities around the world -- that are currently on the eighth and final leg of the race.

CNN: July 12, 2012 -- Updated 1330 GMT (2130 HKT)