Nuclear physicists have made the most neutron-rich form of sodium yet, which will help reveal more about the complex world of nuclei. Image by KTSDESIGN/SCIENCE PHOTO LIBRARY In extremely neutron-rich ...

An element is defined according to the number of protons contained inside the nucleus of each atom. No two elements have the same number of protons, hence each element has a unique atomic number. The ...

"The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of star stuff."—Carl Sagan Almost ...

A few years ago, a group of physicists created an unusual, never-before-seen subatomic particle. Using a particle accelerator at Riken, a Japanese research institute, they slammed streams of calcium ...