We've all heard of the genetic code - the letters that spell out the instructions in our DNA. But that's not the whole story. Researchers are increasingly digging into the epigenetic code - the marks that tell cells which genes to use and which to ignore. Plus, we take a look behind the headlines about older fathers and autism, find out what chimps can tell us about our cancer risk, and our gene of the month might be mistaken for a heavy metal band. Like this podcast? Please help us by supporting the Naked Scientists