It's a cold, desolate place. Not many people go there. But it's natural beauty and potential for science make it an almost haven for some people. However, for the lucky few that get to go, rigorous physical and psychological testing is often required. They sometimes spend months on end in darkness and isolation, with only a few other humans around for thousands of miles. And sometimes mysterious things happen, or crime - this week were talking about what it's like living on Antarctica.