Ten years ago the discovery that the universe is accelerating cemented the currently favored cosmological model with 5% baryons, 20% cold dark matter, and 75% mysterious dark energy. However, questions remain: What is dark matter? What is the nature of the mysterious dark energy? Does General Relativity break down on cosmological scales and must be replaced with a new theory of gravity? Solving these problems presents a tremendous challenge, and the solution is likely to revolutionize our understanding of physics, cosmology, and astrophysics.

The MCTP is sponsoring a three week workshop on "The Dark Side", with the purpose of encouraging collaboration among theorists. Several experimentalists will present results as well, including latest results from GLAST, South Pole Telescope, and weak lensing experiments.