How and why do planets look the way they do? What can Earth tell us about other planets – and vice versa? Paul Byrne, NC State planetary geologist, explains how tectonic, volcanic and impact processes shape planetary surfaces – and what they can teach us about both distant worlds and our own. In part 1 of this two part podcast, we’ll talk about what planetary geology is. In part 2 we’ll explore fascinating facts about our solar system neighbors.