2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87577During the 80's, some experiments and the repetitions of old ones, lead to the hypothesis of a fifth force. Nevertheless, a more accurate research was not able to confirm this hypothesis. This article wants to go over again the most important steps of the event.12 pages, no figuresHistory and Philosophy of Physicstext