Donna Strickland, PhD, professor at the University of Waterloo, is challenged to explain lasers to 5 different people; a child, a teen, a college student, a grad student, and an expert. I'm Donna ...

Whether you’re losing your mind at a Pink Floyd tribute show or playing with your cat, there’s hardly a situation that wouldn’t be made better with a few lasers. “Optical masers” were first described ...