![Figure][1] A bearded dragon before and after changing colour. Photo credit: Adam Elliot. Blushing and suntanning (or sunburning) are probably the best we can hope for on a spectrum of… Click to show full abstract
![Figure][1] A bearded dragon before and after changing colour. Photo credit: Adam Elliot. Blushing and suntanning (or sunburning) are probably the best we can hope for on a spectrum of natural skin tone change; but imagine having access to a whole palette of colours that you could change
               
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