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Scientists have uncovered a surprising hidden ability of light that allows it to develop spinning, twisting behavior as it travels through empty space, without special lenses, mirrors, or materials.

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 ...

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 ...

Over decades of research, scientists have built up a partial picture of what specialized cells within the brain and spinal ...

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 ...

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 ...

EDITOR’S NOTE: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

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 ...

When replacing light bulbs around your home, you may not put a ton of thought into which bulbs you buy beyond their wattage. More specifically, you may overlook the color temperature of the bulbs — or ...

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 ...