How Animals Hacked The Rainbow And Got Stumped On Blue
In fact, of all Earth's inhabitants with backbones, not one is known to harbor blue pigment. Even some of the most brilliantly blue things in nature — a peacock feather, or a blue eye, for example — don't contain a single speck of blue pigment. So, how can they look so blue?
Animals like the blue morpho butterfly and peacocks use structural colors (how cells are are arranged to filter and bounce light) to create their vibrant blues.
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