If you went back in time...

[Leto Atrides]

same planet different dimensions!

Dimensions are length/width/etc., they're not universes.

 

[Kaboom]

Dimensions are length/width/etc., they're not universes.

sliders.

 

[DareDemon]

The theories I belive in:

A. You would cease to exist in that timeline (You'd disappear)

or, the one I like,

B. You'd go back to your own time and no one would remember you.

 

[Arkady Rossovich]

...and killed your mother's mother when she was a child(your grandmother), what would happen?

You would not exist,its too close generation wise.

 

[Rock]

You'd be dead. Period. You were never born, so you never travelled in time...

...but wait! If you never travelled in time, you should be alive, right? Wrong. You DID kill her in your life, and so in your timeline, you're dead.

 

[The Spawn]

I loved Sliders.

 

[Kevin]

I still think that only your timeline dies and your new timeline is the one you're stuck in.

 

[Outsiderzedge]

That better be a woman's ass in your avatar.

 

[The Spawn]

I think so.