Ue-Li Pen*, Xiang-Ping Wu, Jeff Peterson (* Canadian Institute for Theoretical Astrophysics)

PAST: Cosmology Using the Epoch of Reionization.

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I will present some of the science made possible using future 21cm observations of the epoch of reionization, and their potential impact on our understanding of the universe. While only vague constraints currently exist, I will describe the PAST project which aims to image the end of the dark ages. Cosmological inferences include breaking of CMB degeneracies, weak lensing, large scale structure, and the dark energy equation of state.