This fresh perspective shakes up long-held ideas about cause and effect and invites us to imagine an entirely new kind of universe ... space and time into one four-dimensional model.

String theory attempts to unify all four forces, and in so doing ... know which ones might correctly represent the extra dimensions of our universe. It is important to know which ones are correct ...

By mapping the brightest explosions in the universe, scientists may have uncovered a megastructure that defies our ...

String theorists are betting that extra dimensions do indeed exist; in fact, the equations that describe superstring theory require a universe with ... From 3-D to 4-D It's difficult for us ...