Materials scientists can learn a lot about a sample material by shooting lasers at it. With nonlinear optical microscopy—a ...

X-ray beams aren't used just by doctors to see inside your body and tell whether you have a broken bone. More powerful beams ...

Normal cellular processes in living things — from germinating plants to our own cells — create biophotons, though escaping light isn’t visible to us.

Some animals prefer to hide by becoming invisible. Discover more about animals you can actually see right through.