Scientists say that some birds of paradise actually glow under ultraviolet light. The colors are thought to be used for mating and setting territories. Researchers spotted this glow in 37 of the ...

An invisible band of radiation with wavelengths from 400 to 10 nm, ultraviolet (UV) light starts at the end of visible light and ends at the beginning of X-rays. The primary source of ultraviolet ...

In some people that are photosensitive, UV light from sunlight and indoor light sources can trigger a lupus flare. In addition to sunlight, ultraviolet rays are also given off by several different ...