%0 Journal Article %T Phenomenological Aspects of the Pre-Big-Bang Scenario in String Cosmology %A M. Gasperini %J Physics %D 1994 %I arXiv %X I review various aspects of the pre-big-bang scenario and of its main open problems, with emphasis on the role played by the dilaton. Since the dilaton is a compelling consequence of string theory, tests of this scenario are direct tests of string theory and also, more generally, of Planck scale physics. %U http://arxiv.org/abs/astro-ph/9406056v1