2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126766The cosmological observations coupled with theoretical calculations suggest the existence of enormous amount of unseen and unknown matter or dark matter in the universe. The evidence of their existence, the possible candidates and their possible direct detections are discussed.18 pages, no figures. Talk given in Workshop on Physics and Astrophysics of Hadrons and Hadronic Matter, Visva Bharati University, Santiniketan, India, November, 2006High Energy Physics - Phenomenologytext