**Quantum Gravity**- A site maintained by Cambridge University on advances in quantum theories of gravity.- A new road to the Quantum Gravity - This Web site explores the possibility that our universe is not an isolated system. From this hypothesis a quantum origin of the gravitation is obtained.
- An Introduction to Simplicial Gravity - Contains introductory material on quantum mechanics and relativity and outlines one method of combining the two theories.
- An Ode to Effective Lagrangian - A brief introduction is given to the methods of effective lagrangians. The emphasis is on a summary of the overall picture, using a simple model of quantum gravity.
- Canonical Quantum Gravity - This is a summary of a talk delivered at the workshop, "Quantum gravity in the Southern Cone II".
- Cause of gravity and an explanation of field dynamics - An intuitive contribution to the gravity debate.
- Classical and Quantum Gravity - A journal for physicists, mathematicians and cosmologists working in the fields of gravitation and the theory of spacetime. Abstracts full text editorials, and freely available featured articles.
- Cosmological applications of loop quantum gravity - After a brief introduction to classical and quantum gravity we discuss applications of loop quantum gravity in the cosmological realm. This includes the basic formalism and recent results of loop quantum cosmology.
- Gravity as an Effective Field Theory - This is a pedagogical introduction to the treatment of general relativity as a quantum effective field theory.
- How far are we from the quantum theory of gravity? - An assessment is offered of the progress that the major approaches to quantum gravity have made towards the goal of constructing a complete and satisfactory theory. The emphasis is on loop quantum gravity and string theory, although other approaches are discussed.
- How gravity works at microscopic scales - Discusses in simple terms the problem of constructing a quantum theory of gravity.
- Knots and Quantum Gravity - The book "Knots and Quantum Gravity" is the proceedings of a conference held at U.C. Riverside on May 14-16th, 1993. It is now available for free in Postscript format.
- Loop quantum gravity induced modifications to particle dynamics - The construction of effective Hamiltonians arising from Loop Quantum Gravity and incorporating Planck scale corrections to the dynamics of photons and spin 1/2 particles is summarized.
- Matters of Gravity - An online journal with articles on advances in the theories of gravity.
- Max Planck Institute for Gravitational Physics - Institute established to pursue research in gravitational physics, especially general relativity and quantum gravity.
- Neutrons reveal quantum effects of gravity - Article at PhysicsWorld describing the first observation of quantized states of matter under the influence of gravity.
- Perimeter Institute for Theoretical Physics - International focal point of cutting-edge research in foundational theoretical physics.
- Physics News Update - Quantum Gravitational States - Quantum gravitational states have been observed for the first time. An experiment with ultracold neutrons.
- Quantum Gravity - A brief explanation of the search for a quantum theory of gravity, including links to sites on topological field theories.
- Quantum Gravity - Quantum Gravity: A road map towards the Grand Unified Theory.
- Quantum Gravity - revealed by gamma ray bursts? - An article at Astronomy Today.
- Quantum Gravity and M-Theory - A review of modern approaches to quantum gravity.
- Quantum Relativity Theory of Everything - Preliminary look at a new approach to Relativity, Cosmology and the Quantum nature of the universe.
- Sir Isaac Newton: The Universal Law of Gravitation - Provides a simple introduction to the law for which Newton is best known.
- Spin Foam Models - A review of the spin foam formulation of quantum gravity.
- Strings, Loops and Others - This postscript file includes a review of the present theoretical attempts to understand the quantum properties of spacetime.
- Summary Report of the D2 Workshop - A review of material presented at 1998 conference on quantum cosmology.
- Throwing Einstein for a Loop - A summary of loop quantum gravity. Physicist Fotini Markopoulou Kalamara discusses the connection between relativity and quantum theory.