This week I’ll be getting inside your head.....with a question from Jarraryd Dunn. Plus we'll be asking is there any point in switching off your lights, TVs, and phone chargers during the winter?

• Chris, What causes us to "see stars" when we bash our heads? I also notice the same phenomenon ... - Questions
• Why's Graphene Great? - Podcasts
• Tricks of the Mind - Podcasts
• Neuromarketing - The Brain Basis of Buying Behaviour - Podcasts
• Hello Naked Scientists! My name is Ari and I'm a plant pathology student in Helsinki University, ... - Questions
• Don't Worry, be Happy! - Features