The Assembly of Disk Galaxies Over the Last 12 Billion Years of Cosmic Time

New results will be presented from the Atacama Large Millimeter/submillimeter Array that are enabling astronomers to trace the evolution of the gas fraction in disk galaxies using molecular gas and dust continuum observations, constrain the star formation rate, and establish how disk galaxies are assembled. The most massive galaxies formed first, whereas the lowest mass galaxies formed and developed much later and more gradually.