- Physics research links:
E-Print on SPIRES at Stanford
E-Print Archives on ArXiv at Cornell University
Physics Moderated Research Forum sci.physics.research
- Quantum gravity efforts:
Perimeter Institute for Theoretical Physics
Max Planck Institute for Gravitational Physics
- Gravitation email groups:
American Physical Society's Gravitation Group
General Relativity and Gravitation International Society
- Geometric algebra links:
Cambridge University Geometric Algebra Grou