* The Theory of Strings--- A Detailed Introduction: An extensive description of the basic ideas of the theory, by Prof. Sunil Mukhi, a leading string theorist. * String Reviews: List of downloadable review articles on various topics in string theory. Most of them are highly technical, but some of the articles in the "Colloquia/Semipopular" category are intended for a wider audience. * String Theory and the Unification of Forces: An explanation of the ambitious goal of string theory, by Prof. S. Mukhi. * The Second Superstring Revolution: A (somewhat technical) report on the latest developments in string theory, due to Prof. John Schwarz, one of the fathers of the theory. * Black Holes, Quantum Mechanics and String Theory: A series of 10 lectures on string theory, intended for the general public, by Prof. Finn Larsen. * ITP Teachers' Educational Forum on String Theory: Is it the Theory of Everything?: A set of lectures on string theory, intended for highschool teachers. * M-theory, the theory formerly known as Strings: A brief introduction to some ideas of the theory, presented by the Relativity & Gravitation group at Cambridge University. * String Theory in a Nutshell: A brief account of string theory, including some words on the latest developments, by Prof. J. M. Figueroa-O'Farrill. * What is String Theory?: A longer introductory description of the basic ideas of the theory, due to K. LLoyd. * Superstring Theory: An explanation of some of the ingredients of the theory, written some time ago by Prof. Brian Greene, for the graduate program at Cornell University. * String Theory: A short introduction to string theory by Prof. Robert Dijkgraaf, written for physicists. * M-Theory: strings, duality and branes: a non-technical article by Prof. J.P. Gauntlett, which appeared in Contemporary Physics (available in Postscript only). * Other String Links * Other Science Links. While the Standard Model has been very successful in describing most of the phenomemon that we can experimentally investigate with the current generation of particle acceleraters, it leaves many unanswered questions about the fundamental nature of the universe. The goal of modern theoretical physics has been to find a "unified" description of the universe. This has historically been a very fruitful approach. For example Einstein-Maxwell theory unifies the forces of electricity and magnetism into the electromagnetic force. The Nobel prize winning work of Glashow, Salam, and Weinberg successfully showed that the electromagnetic and weak forces can be unified into a single electroweak force. There is actually some pretty strong evidence that the forces of the Standard Model should all unify as well. When we examine how the relative strengths of the strong force and electroweak force behave as we go to higher and higher energies, we find that they become the same at an energy of about 1016 GeV. In addition the gravitational force should become equally important at an energy of about 1019 GeV. Unification of coupling constants The goal of string theory is to explain the "?" in the above diagram. The characteristic energy scale for quantum gravity is called the Planck Mass, and is given in terms of Planck constant, the speed of light, and Newton's constant, Physics at this high energy scale describes the universe as it existed during the first moments of the Big Bang. These high energy scales are completely beyond the range which can be created in the particle accelerators we currently have (or will have in the foreseeable future.) Most of the physical theories that we use to understand the universe that we live in also break down at the Planck scale. However, string theory shows unique promise in being able to describe the physics of the Planck scale and the Big Bang. In its final form string theory should be able to provide answers to answer questions like: * Where do the four forces that we see come from? * Why do we see the various types of particles that we do? * Why do particles have the masses and charges that we see? * Why do we live in 4 spacetime dimensions? * What is the nature of spacetime and gravity? String theory is at this moment the most promising candidate theory for a unified description of the fundamental particles and forces in nature including gravity. As a theory of quantum gravity string theory is at present our best hope to give concretely computable answers to fundamental questions such as the underlying symmetries of nature, the quantum behaviour of black holes, the existence and breaking of supersymmetry, and the quantum treatment of singularities. It might also shed light upon larger issues such as the nature of quantum mechanics and