One materials-related topic that is important for mechanical, civil engineers is the interactions between solids and liquids. Why do some materials absorb water when others do not? How does broccoli remain dry after washing it? How do non-stick pans work? Why is the build plate adhesion of 3D printers so important? What properties of the molten plastics are important for additive manufacturing? This course will discuss how liquids interact with solids, and how these interactions are affected by the chemical, physical, and mechanical properties of the solid, in addition to the viscosity, surface tension, and chemical structure of the liquid. The objective is for students to gain a deep understanding about how liquids and solids interact at interfaces. Examples will be drawn from all fields of engineering and the course is not tilted towards any one discipline in particular.