Gas hydrates (or hydrates) are crystalline solids resulting from the water caging of small molecules, e.g. methane, CO2 or cyclopentane. Recent work considers hydrates for CO2 capture, gas storage and transport. For example, hydrate slurries can be used as novel compounds in secondary refrigeration, a topic that we will jointly pursue with our French collaborators (IRSTEA, ENSTA ParisTech). Due to their high energy content and environmentally friendly nature, hydrates can significantly reduce use of hydrofluorocarbons (HFCs). Rheological studies show that hydrate slurries are non-Newtonian and likely thixotropic, with the interfacial behavior playing a key role. Due to the co-existence of three phases in hydrate slurries, heat and mass transfer between different phases induces local thermodynamic non-equilibrium and flow instabilities (e.g., bubble formation, temperature and density gradients, slip at the wall and between phases), which are likely responsible for undesired temperature oscillations in the convective melting of hydrate slurries. Hydrates also appear in petroleum pipelines under high pressure and low temperature and may cause plugging, though understanding and controlling this phenomenon remains challenging. Hydrates form at the water-oil interface, generating a “crust,” whose morphology allows