A unique mating attempt by a curious butterfly breeder has influenced scientists to shed light on how the butterfly wing’s color mosaic and pattern create and evolve. Scientists from the University of California, Berkeley, and the Marine Biological Laboratory, Woods Hole, have found that buckeyes and Junonia species of butterflies can create a rainbow of structural colors just by adjusting the thickness of the wing scale’s bottom layer, which produces shimmering colors as similar as a soap bubble. Scientists believe that the findings would allow them to classify the genes and developmental mechanisms that can regulate structural coloration.