The ‘arrow of time’ and the fact that it goes forwards has troubled scientists for centuries, but a new theory hopes to answer some of those questions
Why does time only go in one direction? And why is the future so different from the past? They seem obvious questions, but they have troubled scientists for over a century. A new theory has proposed an answer — that time doesn’t run just one way, and that there is another universe, a mirror of ours, where time runs backwards.