A BEGINNER’S GUIDE TO TIME TRAVEL
Everyone can travel in time. You do it whether you want to or not, at a steady rate of one second per second. You may think there’s no similarity to travelling in one of the three spatial dimensions at say, one metre per second. But according to Einstein’s theory of relativity, we live in a four-dimensional continuum – spacetime – in which space and time are interchangeable.
Einstein found that the faster you move through space, the slower you move through time –
