2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/176644I review recent progress in heavy quarkonium physics from an effective field theory perspective. In this unifying framework, I discuss advances in perturbative calculations for low-lying quarkonium observables and in lattice calculations for high-lying ones, and progress and lasting puzzles in quarkonium production.Plenary talk at the 4th International Conference on Quarks and Nuclear Physics (QNP06), 5-10 June 2006, Madrid, Spain; 6 pages, 1 figure, EPJ styleHigh Energy Physics - PhenomenologyHigh Energy Physics - LatticeNuclear Theorytext