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Updated at: 2018-12-01 新题 预测 机经题

Researchers used nanofabrication technicians to create scales structurally identify to the butterflies’, and the structures presented the similar gorgeous colour. The research represented in the journal Nature Nanotechnology. Using the ‘now it’s green, now it’s blue’ technique that the butterflies have evolved, the scientists say we might be able to design money or credit cards that are much harder to copy. And perhaps add a little colourful flour in the process.