This week we find out why we seek out food when we already have enough energy stored around our waists in the form of love handles and pot bellies. Plus we ask - will our skin soak up the calories in sun cream?

• Why don't you make best use of your energy reserves? - Naked Scientists Science Podcasts and Science Radio Shows
• The Science of Farming - Podcasts
• Is the caloric content of food when it is stated on the packet the amount of energy given off when ... - Questions
• Science of Sunday Lunch - A Question of Taste - Features
• Catching Energy From the Sun - Features
• Are all the calories in food absorbed? - Podcasts