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 ...

In 1999, I interviewed Prince for TIME and he told me to leave my tape recorder off because he didn’t trust what future technology might do with unauthorized recordings of his voice. At the time, I ...

Regularly backing up your Mac with Time Machine can prevent data loss and allow you to restore earlier versions of files. To get started, connect a drive that you want to use (and don't mind being ...