Possible low energy manifestations of strings and gravity

Lowering the string scale in the TeV region provides a theoretical framework for solving the mass hierarchy problem and unifying all interactions. The apparent weakness of gravity can then be accounted by the existence of large internal dimensions, in the submillimeter region, and transverse to a braneworld where our universe must be confined. The author reviews the main properties of this scenario and its implications for observations at both particle colliders, and in non-accelerator gravity experiments.