2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85434Fundamental physical constants play important role in modern physics. Studies of their variation can open an interface to new physics. An overview of different approaches to a search for such variations is presented as well as possible reasons for the variations. Special attention is paid to laboratory searches.An invited talk at "Time and Matter" symposium (Venice, 2002)Atomic Physicstext