Here's the best explanation that I've seen: http://www.reddit.com/tb/fjym4 http://www.reddit.com/tb/fjym4 And what do you mean "spacetime doesn't necessarily h

Here's the best explanation that I've seen: http://www.reddit.com/tb/fjym4 http://www.reddit.com/tb/fjym4 And what do you mean "spacetime doesn't necessarily have to obey"?