Why is it that, when your mum asks you to move the TV aerial to a better position, the signal improves while you move it about and then degrades as soon as you let go? We find out what it is that makes the signal improve when you're holding a TV aerial. Plus, we ask how many offspring a sperm donor is likely to generate...

• Why does holding the TV aerial improve the picture? - Naked Scientists Science Podcasts and Science Radio Shows
• Magnets and TVs - Kitchen Science
• Can a Mobile Phone Compromise your Sperm Count? - Podcasts
• Do TV and radio signals travel vertically, and if they do, do they disappear or travel of... - Questions
• Chemistry World - 3D TV, Biofuel Debt and Reading RNA - Interviews
• How many offspring does the average sperm donor create? - Podcasts