The colors and patterns of black swallowtails reveal the diversity of evolutionary dynamics acting on the sexes and the various life-history stages Six species of swallowtail butterflies occur locally ...

But a few minutes later, as the image of the dress sat on my iPhone's screen, the color pattern suddenly shifted to blue-and-black — it was such a jarring change that I thought someone was ...

Some people see a blue and black dress washed out in bright light ... dress and average the colors in Photoshop, we get a flat pattern of color: Two pieces Our eyes are able to assign fixed ...