Theories of quantum mechanics predict that some particles can exist in superpositions, which essentially means that they can be in more than one state at once. When a particle's state is measured, ...

One of the best-performing models in cosmology is also one with the least physical rationale behind it. Columnist Leah Crane ...

Prof Stephen Hawking’s closest collaborator explains emerging evidence supporting the cosmologist’s final thoughts on time.

Explore 25 universe mysteries scientists are still scratching their heads over, from dark matter to the Big Bang's secrets.