>> yeah. well, the question of time is also one that you have to be careful about, because one of the intuitive ideas that we have is a newtonian theory of time and space. it's a framework. time moves forward in the linear fashion and what we do doesn't effect time and space. einstein found under certain extreme conditions you have to take into account how the actors on the stage interact. time and space aefect each other. as you go back in time, when the universe is very, very small, time ceases to have the meaning we think of it as having today. you can't really go back, you can't follow time backwards like it's a railroad track to get to the station and it's the beginning. that question of what's times zero is a difficult question to phrase. >> larry: we'll come back with more, more of your blog comments, too. ♪