How I update my trail running kit for winter The term trail running covers a broad spectrum of potential adventures, from a quick 5k in the local woods to epic, ultra-distance journeys in the ...

Tiny blue lights are being added to semaphores to help police catch motorists who run red lights. When a traffic signal turns red, a blue light facing the opposite direction comes on.

Find out if blue-light blockers really work, and if blue-light blocking products like glasses, skin care, and screen protectors are worth buying.

Previous studies have found that blue light filtering glasses help protect against retinal damage, improve sleep patterns and protect eye health.