At any moment this second universe (or “membrane,” in M-theory—a relative of superstring theory) could crash into ours, ...

M-Theory is a theoretical framework in physics that unifies various string theories and is a candidate for a fundamental theory of everything. A significant aspect of M-Theory involves the study ...

His contributions to string theory have been myriad ... particle with a string leads to such a big change in things. I'm tempted to say that it has to do with the fuzziness it introduces.