This seminar course will focus on discussion of planetary surfaces and their evolution, including geology of rocky planets and moons, icy surfaces and moons, regolith development, surface-atmosphere interactions, sub-surface structure and interiors, and climate change. The course will involve the exchange of scholarly information in a small group setting, including presentations and discussions of student research, reviews of recent science results and discussion of proposal ideas. Students will be expected to lead 1 to 2 presentations and participate in group discussions. This course is intended for graduate students; senior undergraduates may be able to enroll with permission of the instructor. Alternative Grading S, P, F; may be repeated for 10 completions/units.