Dark matter is a difficult subject because, on the one hand, we don’t really know if it even exists at all. On the other hand, many models of the universe rely on it to work. So, when a theory comes ...

Asking what existed before the Big Bang is often dismissed as meaningless, since traditional physics breaks down when pushed that far back in time. Yet a new paper published in Living Reviews in ...

A physics experiment published this year that claimed to measure a single photon in two places at once – and, in the process, discredit the idea of a multiverse – drew pushback from many sceptical ...