The Fongoids screwed it up, so now the great clock basically stops us from being able to do it. At least that's what I've learned from A Crack in Time so far.
Actually in quantum phsysics (as far as my brother has explained it to me) time flows in both directions, it's just that we seem to be hard wired to only perceive it flowing in one direction. There is an hypotyhesis floating around that sugggests the universe works at the micro scale in part by individual particles travelling through time to interact with it's past or future self.
There is also a theoretical mechanism for travel between past and future involving creating wormholes and having one end of the wormhole travel around at near light speed so that it winds up existing ahead of time of the other end of the worm hole and thus you can tyhen freely travel between past and future. But the earliest past you can travel back to is the time when the wormhole was first created. So you still can't live the dream of taking a minigun back to the time of the Crusades and laying waste to the heathens, or the infidels (depending on which side you like best).
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
