Fluorescence is the phenomenon of shifting one wavelength of light into another. There are lots of different kinds of glowing, from bioluminescence to fluoresce. Some molecules can absorb ultraviolet light and re-emmit it in a way that pushes it into the visible spectrum so we can see it.
An accidental discovery on a nighttime walk led one scientist and his team to wonder: How many mammals glow under ultraviolet light? The list keeps growing, but scientists still aren’t sure why these furry creatures glow.
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