Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that describe gravity, quantum fields and the structure of spacetime now allow ...

Physicists are quietly rewriting the rulebook for how we might cross the gulf between stars, not by bolting bigger rockets to ...

At the turn of the 20th century, physicists realised their understanding of the subatomic world was wrong. A new theory was born: quantum mechanics. Despite defying everyday notions of the nature of ...