Introduction to the ekpyrotic universe, written by the model's creators, Paul J. Steinhardt and Neil Turok. Most of the text can be understood with basic physics knowledge; some sections require advanced knowledge.

Review of cosmological models based on string theory, with a focus on large extra dimensions. Based on a talk by Gerald Cleaver (Baylor University and HARC) at COSPAR '02, Houston, Texas, October 2002. Presupposes previous knowledge in astronomy and particle physics.

An introduction to string theory-based cosmological models. Based on lectures given by Nick E. Mavromatos (King's College, London) at the First Aegean Summer School on Cosmology, Samos, in 2001. Suitable for graduate students and more advanced readers.

A self-contained introduction to string cosmology and, in particular, to the background of relic cosmic gravitons predicted in the context of the so-called "pre-big bang". The text is aimed at graduate and advanced undergraduate students, and based on notes for lectures held by M. Gasperini at two schools in 1997 and 1998.

Lecture notes based on summer school lectures given in 2001 by E. Papantonopoulos (National Technical University of Athens). Suitable for graduate and advanced undergraduate students.

Introduction to pre-big bang scenarios based on string theory, with a focus on physical motivations, considerations, and consequences. By Gabriele Veneziano (CERN); suitable for graduate students and researchers.

Article the ekpyrotic model of cosmology, and related concepts, suitable for a general audience. Written by George Musser and J. R. Minkel, and published in Scientific American.

A lecture on colliding branes and the origin of the hot big bang by Paul Steinhardt (Princeton University). Comprises RealPlayer stream and slides; hosted by the University of Michigan.