Achieving a physical characterization of galaxies in the reionization epoch has been a long-standing goal in extragalactic astronomy. Fortunately now significant progress is being made thanks to advances made possible by ALMA. Recent result have shown detection of bright like [CII]158um and [OIII]88um and also dust continuum in a number of sources. These observations offer a unique and powerful insight into the physics governing these extreme objects. Thanks to new ALMA observations from two

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... grams over extremely luminous z~7-8 galaxies identified from wide-area fields, we have gained a better understanding of the physical properties of bright galaxies in this epoch. We have detected 4 new galaxies in the dust continuum, doubling the number of dust detections in the epoch of reionization, while allowing us to put interesting constraints on the obscured star formation and dust properties of these bright galaxies. We have furthermore detected 3 new luminous [CII]158um lines and a number of [CII] line candidates, including the most distant [CII] detection to date, allowing us to gain better insight into dynamical masses, redshift distributions, and physical properties of the interstellar medium in galaxies during the first billion years of the universe.