Physicists are drawing closer to answering a long-standing mystery of the universe: how long a neutron lives. Neutrons are electrically neutral particles that usually combine with protons to make up ...

While all atomic nuclei except hydrogen are composed of protons and neutrons, physicists have been searching for a particle consisting of two, three or four neutrons for over half a century.

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London. Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and ...