2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89033On the occasion of the 100th anniversary of the birth of the quantum idea, the development, achievements, and promises of quantum mechanics are described.12 pages, LaTeX, slightly edited text of article published in Science, August 11, 2000 (Pathways of Discovery); email to kleppner@mit.edu or jackiw@mitlns.mit.eduQuantum PhysicsHistory and Philosophy of Physicstext