“If the item is glass, and fluoresces neon green under a black light, it contains uranium dioxide 100 percent of the time.” Look deeper. Not all items are bright green; other colors include ...

Like the luminous lighting bugs and fireflies that light up the night sky across the United States, glow-worms and their green glow shine across parts of Europe and Asia. These beetles are in the ...

Artificial light is bad news for a wide range of wildlife, but it can be a particular challenge for a unique subset of species: those that make their own glow. “With bioluminescent creatures ...

Dr. Universe: Why do glow-in-the-dark things light up when it’s dark? – Haygarth, 5, United Kingdom. Dear Haygarth, I love glow-in-the-dark stickers. I leave them next to a sunny window for a ...

Pink squirrels and green sharks—why do so many animals ‘glow’ in UV light? Animals with ultraviolet color patterns can be found all over nature.