An exercise scientist explains how to gauge the risk As the summer’s sunny days take hold, many people turn to outdoor exercise. But in parts of North ...

Americans in at least 16 states could see heightened levels of ultraviolet (UV) radiation on Friday, according to a forecast ...

Sunscreens contain active ingredients that can break down over time, especially when exposed to heat, light, or humidity. And ...

After passing a Dark Sky ordinance to curb light pollution and save energy, Pittsburgh is installing adjustable streetlights.