2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3837An account is given of the development, and the status, of the modified dynamics (MOND)--a proposed alternative to dark matter, which posits a breakdown of Newtonian dynamics in the limit of small accelerations.16 pages. Presented at the XXV International School of Theoretical Physics ``Particles and Astrophysics--Standard Models and Beyond'', Ustron, Poland, September 10-16, 2001Astrophysicstext