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 ...

Though they're so common that we don't typically give them much thought, lights are fascinating elements of the modern world. By sending an electrical current through a conductor, extreme amounts of ...

Faulty LED streetlights have been turning purple for years across America. As the lights fail, many are replaced. That has led to years of purple streetlights that seemingly appear and then disappear ...