Butterfly wings could hold the key to developing clothes that change colour on demand

Butterfly wings could hold the key to developing clothes that change colour on demand | Mail Online: "Tiny crystal-like structures discovered in the wings of tropical butterflies could lead to colour-changing clothing, according to scientists. Physicists from Hong Kong discovered how subtle differences in the layers of butterfly wings create varied patterns of colour, even among closely related species. They claim that this process could be replicated and lead to materials being developed which can be 'tuned' to change colour on demand."