In many places, the answer is uranium. The isotope uranium-238 is typically considered to be the heaviest element found in the natural world. It’s atomic mass is 238 – 92 protons and 146 neutrons.

Scientists using two enormous telescopes — one on Earth and the other in space — have detected oxygen in the most ancient ...

We are at a critical time and supporting climate journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen ...

Physicists have measured a nuclear reaction that can occur in neutron star collisions, providing direct experimental data for a process that had previously only been theorised. The study provides new ...

Physicists have measured a nuclear reaction that can occur in neutron star collisions, providing direct experimental data for a process that had previously only been theorised. The study, led by the ...