The neutron plays a fundamental role in the universe and its discovery was at the heart of developments in nuclear physics in the first half of the 20th Century. Prof Val Gibson tells Melvyn Bragg ...

He called it a neutron, and imagined it as a paired proton and electron. There was no evidence for any of these ideas. Chadwick kept the problem in the back of his mind while working on other things.

Neutron stars can have a resounding impact around the universe. Scientists recently announced the first detection of gravitational waves created by two neutron stars smashing into each other ...