Learn more› By Teresa Carr Using a wand or scary-looking mask to bathe your face in red light is all the rage for helping to make skin look and feel better. But another use for red light therapy ...

Barring a freak power outage, the light emanating from towns and cities due to unnatural light sources is so bright that it washes out the stars. Today one-third of all humans, including 80% of ...

Here’s how it works. The speed of light traveling through a vacuum is exactly 299,792,458 meters (983,571,056 feet) per second. That's about 186,282 miles per second — a universal constant ...

Blue light -- the kind from your smartphone, tablet, TV, and even energy-efficient light bulbs -- is not necessarily damaging to the eyes but can trigger eyestrain and lead to a range of health ...

A mysterious spiraling blue light illuminated the night skies over Europe on Monday. The cosmic whirlpool was captured in stunning video and appears to have been created by the SpaceX Falcon 9 ...

Brenner's initial main target has been seasonal flu, but that could change. "UV light really doesn't care about the details of whether it's a bacteria or a virus. It can kill all of them ...