For string theory to make sense, the universe should have nine spacial dimensions and one time dimension, for a total of ten dimensions.
I like to think that Einstein would look at string theory’s journey and smile, enjoying the theory’s remarkable geometrical features while feeling kinship with fellow travelers on the long and winding road toward unification.
When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level.
We’re on this planet for the briefest of moments in cosmic terms, and I want to spend that time thinking about what I consider the deepest questions.