Physicists and vision scientists are lining up behind a provocative claim: the rich color we call purple is not a property of light at all, but a story the brain tells itself. Light in the real world ...

The world is awash with the color purple — lavender flowers, amethyst gemstones, plums, eggplants and purple emperor butterflies. But if you look closely at the visible-light portion of the ...

Green is a sign of life on Earth, but other habitable planets could be teeming with purple microbes that we should be able to detect with telescopes. Reading time 2 minutes In a little more than 30 ...