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M. Kamionkowski (Columbia University)
Is our Universe open, closed, or flat? Will it expand forever or eventually recollapse? Why is the Universe so homogeneous on the largest scales, and where did galaxies, clusters, and structure on even larger scales come from? Is a period of inflation responsible for the expansion of the Universe? And if so, what new physics is responsible for inflation? I will discuss how forthcoming experiments to map the temperature and polarization of the cosmic microwave background will address these questions, and perhaps more.