I havent had the opportunity to check out the new flick called The Time Machine, but I did read the book. Before thinking of Time Travel, I believe I have to first consider what time is. Spacetime (in my opinion) is infinite. We can express this pattern by thinking of a Pretzel. The Pretzel of Infinity! Space and Time all wrapped up into one great big Pretzel. Therefore, can I construct a machine and travel back to Before I was born and kill my grandfather? Yes. My reasoning is simple. Because Spacetime is infinite, there are infinite possiblities for the outcome of all events. therefore, If I did travel back in time and killed my grandfather, I could still exist. what do you guys think???