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Presentation #401.05 in the session “New Views of Galaxy Formation and Evolution”.
The transition from a neutral to ionized intergalactic medium is a landmark event in cosmic history. Facilities such as the Hubble and Spitzer Space Telescopes and ALMA have provided a first glimpse of the properties of galaxies in this early phase of the universe. I will discuss what we have discovered so far and some of the outstanding questions. I will talk about progress expected in the next few years with the launch of the James Webb Space Telescope.