nuclear

On Tuesday, physicists at the Lawrence Livermore National Laboratory in California achieved ignition: a stable fusion reaction that produces more energy than its input.

Neutron stars can form when a giant star goes supernova. During a supernova, the star’s core collapses, and the remaining protons and electrons get squeezed together so tightly that their nuclei touch.

Today, 440 nuclear reactors are operating in 30 countries worldwide. The energy generated by these plants provides 10 percent of the world’s electricity. But after we use nuclear fuel, what happens to the waste, and how do we handle it?