 Well, there are all kinds of really cool things which the next generation of Earth scientists will be studying. And I view myself as just sort of touching several problems which I'm really curious about. For example, with ice, people do not understand the dynamics of glaciers. Why is it that they flow? How do they flow? There are many, many questions about photosynthesis, which we need to understand better. In all of these considerations for ice, for photosynthesis, for the oceans, these are really important for climate and how we maintain a stable Earth and don't get too warm, which is a real problem if we continue doing what we're doing now.