Blue has historically been avoided in cosmetic chemistry, as the pigment emits a smelly gas at a low pH. But scientists at the University of Toledo have found a way to incorporate ultramarine blue ...

Few natural wonders are as breathtakingly surreal as the electric blue flames dancing across Indonesia's Kawah Ijen volcano.

Blue blood may look alien, but it’s one of evolution’s most elegant solutions to life in extreme environments. Here’s how ...