NASA astronaut John W. Young, commander of the Apollo 16 mission, took a far-ultraviolet photo of Earth with an ultraviolet ...

was invited to shine his ultraviolet (UV) torches on some of the best nature spots in Pembrokeshire and Monmouthshire. His photos of temperate rain forest in Wales reveal shapes, structures and ...

Some molecules respond to light in a matter of seconds. In the case of this dithienylethene compound, ultraviolet light triggers a ring-forming reaction, turning the colorless solution deep red.