General relativity is in the old Newtonian framework where you predict what will happen, not the probability of what will happen. And putting together the probabilities of quantum mechanics with the certainty of general relativity, that's been the big challenge and that's why we have been excited about string theory, as it's one of the only approaches that can put it together.
Brian GreeneI think math is a hugely creative field, because there are some very well-defined operations that you have to work within. You are, in a sense, straightjacketed by the rules of the mathematics. But within that constrained environment, it's up to you what you do with the symbols.
Brian GreeneWhen kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level
Brian GreeneArt makes us human, music makes us human, and I deeply feel that science makes us human.
Brian Greene