Higher levels of exposure to artificial light at night were linked to increased stress-related activity in the brain, inflamed arteries and a higher risk of heart disease, according to a small study ...

A light-year is how astronomers measure distance in space. It’s defined by how far a beam of light travels in one year – a distance of six trillion miles. Think of it as the bigger, badder cousin of ...

Light therapy is an alternative treatment method for dry eyes. It works by treating meibomian gland dysfunction, one of the most common causes of dry eye. When first-line treatments — such as eye ...

Light therapy can be defined as exposure to daylight or specific wavelengths of light for a prescribed amount of time in order to treat seasonal affective disorder, acne, and a myriad of other ...

You may have seen red light therapy treatments on the spa menu at your dermatologist's office recently. And if you haven't, you've definitely noticed influencers and celebrities waxing poetic about ...

Kaiwei Tang helped create the iconic Motorola Razr over 20 years ago. Now, 10 years into building Light, the startup behind the minimalist smartphone alternative Light Phone, he’s as surprised as ...

Go outside on a bright and sunny day. Take a look at a flower or a tree. You can see that flower because light from the sun travels all the way to the flower. When the light reflects off the flower it ...

It is International Dark Sky Week, an annual event when stargazers around the world raise awareness of our diminishing night sky. In many bustling cities and towns, bright lights from towering ...

The light-year is an indispensable unit of measurement for anyone trying to understand outer space. Get a group of astronomers talking, and you’ll hear them say “light-years” about as often as you ...