By using a rare thorium nucleus as a timekeeper, physicists have demonstrated the first working nuclear clock, a device that ...

For most stars, neutron stars and black holes are their final resting places. When a supergiant star runs out of fuel, it expands and then rapidly collapses on itself. This act creates a neutron ...

Casey Harrell using a brain-implant interface. (Regents of the University of California, Davis) This Week in Science: A world ...

A simulation of a rapidly accreting white dwarf showing a proposed site for the intermediate (i) process and the Summing NaI (SuN) detector. The research studied the 139Ba+n reaction, constrained by ...

Nuclear fallout events, whether triggered deliberately or accidentally, are something we hope will never happen. But if they ...

When a star dies, it generates an explosion of elemental nuclei and hurls them into space. Those elements, called cosmic rays ...

Coupling a power uprate with burnup extension—or how long fuel can produce power before being replaced—allows fuel to operate ...

The figure illustrates the experimental setup used to measure neutron leakage spectra from natural lead (nat Pb) slab samples, employing both D-T and D-D neutron sources at the integral experiment ...

A new experiment conducted at the National Ignition Facility (NIF) assessed the ability of U.S. nuclear weapons to survive encounters with adversary missile defenses and reach their targets. The ...

The U.S. and China lead global efforts to make nuclear fusion commercially viable, with billion-dollar projects aiming for net-positive energy. Los Alamos scientists successfully recreated a 1938 ...

The curious minds at What If explore the most dangerous nuke experiments ever.