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.

Atoms are made of three things: protons, neutrons, and electrons. Electrons are a type of fundamental particle, but protons and neutrons are composite particles made of up and down quarks. Protons ...

Physicists have shown that extremely light particles known as axions may occur in large clouds around neutron stars. These axions could form an explanation for the elusive dark matter that ...

When considering what makes up a human body, a physicist drills down beyond the atomic level. Columnist Chanda ...

The idea of opening a portal to a parallel universe sounds like pure science fiction. It brings to mind stories filled with ...