
Originally Posted by
AntonioLao to an outside observer of spacetime, events can go forward or backward. However, living inside spacetime, all events can have only one positve time axis, the negative axis is close to zero but not exactly zero. If there is a way to increase the magnitude of the negative axis then time direction can be controlled and we can then go forward or backward in time directions, positive or negative. The key point to all these is that it is necessary that we cross our dimensional plane into lower or higher dimensions.