Wellness influencers tout the therapy's power for everything from rejuvenating skin and hair to boosting longevity. Devices sold for at-home use abound. We look at the evidence behind the hype.

Scientists experimentally confirmed what we’ve known to be true for half a century—darkness can “travel” faster than light.

A light-sensitive crystal is opening the door to a new era of “light-written” technology. Arsenic trisulfide can be reshaped ...

Scientists have unveiled a groundbreaking discovery: a material capable of bending light in unprecedented ways. This advancement opens up possibilities for innovations in optics, including superlenses ...

Red light therapy has become the latest ray of hope in the wellness industry. On social media, influencers claim it can deliver everything from younger-looking skin to more hair growth, better sleep ...

In 1845, Michael Faraday discovered what’s known today as the Faraday Effect—which describes how light and electromagnetism are related. A new study revealed that the magnetic component of light ...

From pinpricks of darkness to lobsters feeling pain, here's what in the news this week.