This study confirms his theory, showing that these birds glow under both blue and UV light. Not all birds exhibit ...

A mysterious spiraling blue light illuminated the night skies over Europe on Monday. The cosmic whirlpool was captured in stunning video and appears to have been created by the SpaceX Falcon 9 ...

which is why the ink appears blue. Highlighter pens contain chemicals that absorb visible light as well as ultraviolet (UV) light, which humans cannot see. The UV light “excites” the electrons ...

If you’ve ever suffered from dry, irritated eyes or struggled to fall asleep after a long day of staring at your computer, you may have been tempted to purchase a pair of blue-light-blocking ...