Since the Mars Science Laboratory Curiosity rover arrived in Gale crater in August 2012, the Curiosity team has addressed questions of early Mars habitability through the exploration of a diverse sequence of sedimentary rocks. For the past three years, Curiosity has been exploring its main exploration target—the lowermost strata of the 5 km-high mountain in the center of Gale crater, informally named Mount Sharp. During the trek upward through the basal units of Mount Sharp, the Curiosity team has observed the evolution of an ancient lake system, including evidence for cycles of wetting and drying, deposition by wind and rivers, and the pervasive interaction of water with sediments in the shallow subsurface. This talk will review recent discoveries by the Curiosity rover team and will show how the rover’s exploration continues to reveal the complex and long-lived depositional history of the Gale crater basin.