You know you're a science nerd when you can have fun picking up rocks. After having more brushes with death than he can count, Mark takes comfort in something as simple and as logical as geology. It must be a relief to simply be a scientist again.

The Hab is Mark's home away from home. It provides him shelter, food, and—most importantly–-a little bit of relaxation. It's not much, but it'll have to do.

Of course, it's not all sunshine and daisies—there's no way that six people can live together without any conflict. The important part is that they all eventually get back together, no matter what petty squabbles they might have had. In a way, it's a lot like living in a college dorm—except, you know, the whole space part.