People keep searching for “burning laser hacks,” but that’s a fast way to get hurt or start a fire. This video breaks down ...

In junior high school in the 1970s, I built a small helium-neon laser. (Yes, I was a science geek.) By built, I mean I ordered a sealed gas tube with mirrors on both ends and built a high-voltage ...

Kelli Halston Hoversten, of Columbia, Mo., can no longer see out of her left eye. Her right eye is better. She has partial vision. But before Aug. 30, 2014, Hoversten could see perfectly. On the day ...

You’ve probably seen viral “burning laser” videos, but most don’t explain what’s actually happening. Here, we take a safe, educational look at how lasers focus light, how power levels are regulated, ...

Lasers are at the cutting edge of surgery. However, there is still a lot that scientists do not know about the ways in which laser light interacts with living tissue. Now, some of these basic ...