WHAT IS SPACE-TIME? THE TRUE ORIGINS OF THE FABRIC OF REALITY

The fabric of space-time is a conceptual model combining the three dimensions of space with the fourth dimension of time. According to the best of current physical theories, space-time explains the unusual relativistic effects that arise from traveling near the speed of light as well as the motion of massive objects in the universe. A bold new perspective suggests space-time isn't a fundamental entity but emerges from quantum entanglement. Space-time is simply the physical universe inside which we and everything else exists. And yet, even after millennia living in it, we still don't know what space-time actually is. Physicists have strived to work it out for more than a century. In recent years there have been numerous attempts to figure out what might be the threads from which the fabric of reality is woven. One idea is that space-time emerges from a weird property of the quantum world that means particles and fields, those fundamental constituents of nature, can be connected even if they are at opposites ends of the universe. If that is correct we might be on the threshold of a theory of quantum gravity. We would also have the most startling demonstration yet that the world we see isn't the world as it really is.