>>12
I'm sure you already know this, but to clarify for others:
Keep in mind wormholes are theoretical too. Even if they do exist, it may not even be possible to travel through them as well.
As for the entire concept of time travel, I like to keep an open mind. We don't fully understand everything on our own planet, let alone the entire universe (and don't forget about multiple universes either), so anything is possible at this point. But it's an amusing thought isn't it?
I'll also throw out another thought for you, time travel through existing in a higher dimension.
http://www.tenthdimension.com/
Hope you enjoy it.