Cosmology and quantum physics both offer tantalizing possibilities that we inhabit just one reality among many. But testing ...

Physics is the study of the underlying laws and mechanisms explaining how the universe works. Most of what we do in daily life is based on a principle or law of physics—dealing with forces, motion, ...

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...

Columnist Natalie Wolchover checks in with particle physicists more than a decade after the field entered a profound crisis.