You've probably seen movies where life-threatening events unfold in slow motion. Those moments during a car crash or a fall feel stretched out, as if someone hit pause on the world around you. This ...

Daryl Janzen does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...

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 ...