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

that absorb certain wavelengths of ultraviolet light and emit it in blue-green wavelengths that are visible at night and appear to glow. For background, most of us know UV light as its most common ...

Brightly pigmented petals starkly contrast a black background as specks ... photographing flowers is a cucumber flower glowing a bright orange and blue with very bright pollen.

The proteins, pigments, and other materials that make up bones help them to glow under ultraviolet light—just think of how your florescent smile lights up under a black light. We've known that ...

Under UV light, ripening bananas appear in a bright blue color, which is is connected to the degradation of chlorophyll. Ripe bananas are of course yellow. However, under black light, the yellow ...

In late September, astronauts Thomas Pesquet and Andreas Mogensen spotted a glowing blue light over Europe from up in the ISS. They recorded a timelapse and posted a frame of it on Flickr.