This week, it's another foray into the realm of science and politics, and the messy way they influence each other. We're joined by Dr. Andrew Rosenberg, director of the Center for Science and Democracy, to discuss the evidence and the arguments about the controversial oil extraction technique known as "fracking." And we'll talk to science librarian and blogger John Dupuis, about the Canadian government and its closure of Department of Fisheries and Oceans libraries.