Earth's climate and atmosphere are incredible: they allow us to live and breath in a relatively stable and comfortable environment. Even though they are less hospitable, other objects in our solar system also have atmospheres and climates and we can learn a lot about our own planet and how it is changing by studying these alien systems. Dr David Grinspoon is an expert comparative planetologist, as well an author and public speaker. We're going to talk about the study of alien planets, climate change, and how to be a responsible scientist in the age of climate change and science skepticism.