But no one has been able to X-ray an individual atom—until now. Physicists used X-rays to study the insides of two different single atoms, in work published in the journal Nature on Wednesday.

BOSTON - The protective aprons used during dental X-rays may be doing more harm than good. If you've ever had an X-ray of your teeth at the dentist, you've had a heavy lead apron draped over you ...

But the smallest amount to date that can be X-rayed is an attogram, or roughly 10,000 atoms. That's because the X-ray emission of a single atom is just too weak to be detected—until now.

NASA's Chandra X-ray Observatory spotted the X-ray emissions by chance last year while focusing on a supernova remnant, or the remains of an exploded star. Wang said it was the first time X-rays ...

Its Wide-field X-ray Telescope (WXT) borrows from the design of a lobster's eye, with hundreds of thousands of tubes arranged in 12 modules that are positioned such that the WXT can take in a ...

Dental X-ray exposure levels are very low — and much lower than they used to be, Dr. Brenner said. “Over the last 30 years or so, the technology has improved,” he said.

A major X-ray observing mission is set to launch on Saturday (Aug. 26), aiming to provide astronomers with views of some of the universe's most extreme, explosive and hot objects and events.

The versatility of X-ray absorption and emission spectroscopy has made it a unique tool for determination of chemical, structural, and electronic properties of matter with successful applications ...