This book contains the lectures delivered at the Second Paris Cosmology Colloquium (second ‘Journée Cosmologie’) held at the Observatoire de Paris from Jun

The purpose of this meeting was to cover selected topics of high current interest in the interplay between cosmology and fundamental physics. It brought togethe

String theory is a model of fundamental physics whose building blocks are one-dimensional extended objects called strings, rather than the zero-dimensional poin