Our Mathematical Universe: My Quest for the Ultimate Nature of Reality

students in Level I parallel universes would learn the same thing in physics class but different things in history class.

energy corresponds to time-translation symmetry (that our laws of physics stay the same for all time), momentum corresponds to space-translation symmetry (that the laws are the same everywhere), angular momentum corresponds to rotation symmetry (that empty space has no special “up” direction) and electric charge corresponds to a certain symmetry of

recommend Brian Greene’s book The Hidden Reality and Russell Standish’s book Theory of Nothing

• You’re self-aware rather than just aware because your brain’s reality model includes a model of yourself and your relation to the outside world: your perceptions of a subjective vantage point you call “I” are qualia, just as your subjective perceptions of “red” and “sweet” are.