What does General Relativity Theory say about time travel?

[Valo130]

I am going to give write an essay about time travel.
What does science say?
What is the arguments for possibility and against possibility.
And what does General Relativity Theory say about time travel?

Theoretical possible, but not practically?

 

[berkeman]

I am going to give write an essay about time travel.
What does science say?
What is the arguments for possibility and against possibility.
And what does General Relativity Theory say about time travel?

Theoretical possible, but not practically?

Wikipedia is usually a good intro reference for simple stuff, but can be problematical for more complicated stuff like your question. Still, it might be good reading for you to get started, and you can follow the links out of the page to other references:

http://en.wikipedia.org/wiki/Time_travel

.