Will fracking bring down energy prices and keep our lights on, or could it be an environmental disaster? Kate Lamble and Ginny Smith speak to a panel of experts about whether fracking could really contaminate water supplies or cause earthquakes. Plus, can methane from Shale Gas extraction contribute to global warming? In the news, whether a country's hygiene is linked to their Alzheimer's rates, why we feel so good when we cheat and how to spot a pregnant panda...