At this point, Mark just wants to survive. Maybe the work he's doing now will set the stage for future human colonization of Mars, creating the guidebook that later explorers will follow. That would actually be pretty awesome. Still, Mark has no desire to stay on Mars any longer than he has to.

Well isn't that adorable. It's actually a good idea when you think about it—camaraderie is a crucial ingredient for a successful mission. If it was us, we'd be way too lazy to do any work after eating all of that turkey. And stuffing. And pie. And now we're hungry.