THIRSTEE (Tracking Hydrates In Refined Sub-neptunes to Tackle their Emergence and Evolution) is a groundbreaking research project based at the Institute of Astrophysics of Andalusia (IAA-CSIC) and fully funded by an European Research Council (ERC) Horizon Starting Grant. The group, led by PI Dr. Rafael Luque, focuses on the study of sub-Neptunes—the most common planets in the Galaxy—by combining transit photometry, high-precision radial-velocity observations, and atmospheric characterization within a novel statistical framework to uncover the origin, compositions, and architectures of these unique planetary systems.