Medicine & TechnologyA new study revealed the efficacy of far-ultraviolet light that kills active bacteria that causes diseases. Find out how safe this approach is in humans.
Having a daily fix of sunshine could help enhance one's overall health, with a new study linking time spent outdoors with improved mood, better sleep, and lower depression risk for a lifetime.
A dark letter on a white page contains is presumed to have a similar contrast outdoors, under the brightest light, compared to indoors, under the dimmest light.