I like the idea of the "Fred & Barney" syndrome.

They drive and drive and all they do is pass the same tree, mailbox, house and tree again...over and over.

If you tried to leave Earth on a ship in a straight line toward anwhere (this way, or that way, or over there...), you would theoretically arrive back where you started. You can't look to the "outer edge" of the Universe because there isn't one.

Check this out for proof. Astronomers don't have to choose a direction when trying to look back in time (very far in space)... it is everywhere. No matter which side of the sun we are on, we can look "up" into space and back into time....whether they are in Australia, or in Alaska. Up-Down-Sideways....every direction only points toward the beginning... never the other way.

You can have only history...not future. Not even present.