Light-emitting diodes (LEDs) are so ubiquitous that it's easy to forget just how much society relies on these underappreciated technological wonders. Yet, the history of the LED goes back further than ...

When you flip a switch or power up your smartphone, the last thing on your mind is whether that light could be messing with your body's internal systems. Yet here's something lighting manufacturers ...

Not to sound like a TV commercial or anything, but … how often have you had to throw out white shirts because of unsightly yellow underarm stains? Well, those stains may not be a problem any longer, ...

It’s hard to believe that the first blue LED didn’t arrive until 1993. They look simple, but looks are deceiving (Fig. 1). 1. Image showing a blue InGaN-based LED with gold wire contacts (0.4 × 0.4 mm ...

It may not be great on the eyes, but it could be a new way to take care of those pit stains. By Andrew Paul Published Sep 3, 2025 10:00 AM EDT Get the Popular Science daily newsletter💡 Breakthroughs, ...