Schedule Nov 05, 2001
A Cyclic Model of the Universe
Dr. Neil Turok, Cambridge
I discuss a new model for the Universe, which is a development of the ekpyrotic scenario. The usual puzzles addressed by inflation -- the horizon, flatness, and fluctuation puzzles -- are resolved but in a completely different way. The new model goes further than inflation in several respects. It connects M-theory and string theory to the early universe, showing how the initial singularity may not be the impenetrable barrier it has been hitherto thought to be, thereby resolving the puzzle of the origin of time. It addresses the relative abundances of the different types of matter in the universe today and provides a clear and remarkable raison d'etre for dark energy present in today's universe.

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