Supersymmetric String Theory Is a very deeply grounded concept based on the existence of particle ?spin?. This general line of reasoning has been very successful in other aspects of particle physics. Predicts the existence of a whole new set of partner particles for every particle that is now seen. Some of these might be produced at the Large Hadron Collider.
urtalk, 5 years ago
limit of cosmic knowledge : Talk by Sandra M. Faber on 11-Dec'12