6D Two-timing

摘要

Whenever physicists devise theories of the universe that invoke extra dimensions, they always seem to mean the kind in which you could theoretically, if you could find them, move freely. In other words, hyperspace is just that: space. When it comes to higher dimensions, time does not get a look in. There's a good reason for that. If there were more time-like dimensions, things could shuttle between arbitrary points in our one-dimensional time by looping through other time dimensions, circumventing the limitsrnimposed by light's finite speed. In other words, time travel would be possible.