Azula wields blue flames when she does her firebending in Avatar: The Last Airbender, but the explanation behind that has ...

A rare volcanic phenomenon can be seen at Kawah Ijen and Ethiopia's Dallol volcano, where lava appears to glow blue due to ...

We're all familiar with bright red fire hydrants, the color of which has become synonymous ... with 1,000 to 1.499; and blue ...