This is one of my favorite plot devices in science fiction. See Asimov's drastically underrated The End of Eternity. http://en.wikipedia.org/wiki/The_End_of_Et

This is one of my favorite plot devices in science fiction. See Asimov's drastically underrated The End of Eternity. http://en.wikipedia.org/wiki/The_End_of_Eternity http://en.wikipedia.org/wiki/The_End_of_Eternity http://dl.getdropbox.com/u/101698/Asimov%2C%20Isaac%20-%20The%20End%20of%20Eternity.rtf http://dl.getdropbox.com/u/101698/Asimov%2C%20Isaac%20-%20Th...