The color purple has long been a symbol of royalty, creativity, and mystery. But according to science, it's also something else: a figment of our imaginations. While it looks just as real as red or ...

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 ...