2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/184956The quantization of gravity, and its unification with the other interactions, is one of the greatest challenges of theoretical physics. Current ideas suggest that the value of G might be related to the other fundamental constants of physics, and that gravity might be richer than the standard Newton-Einstein description. This gives added significance to measurements of G and to Cavendish-type experiments.6 pages, Revtex, contribution to the Cavendish bicentennial conference, to appear in Measurement, Science and Technology, minor changes in the referencesGeneral Relativity and Quantum Cosmologytext