How many friends for best brain health?

This month join host Dr Chris Smith to hear how a nuclear power station provides the opportunity to test theories of the effects of global warming on how fish grow, evidence that personalised medicines have an added placebo effect, the genes for skin colour and skin cancer, why five friends is optimal for best brian health, and the role of the immune system in the ageing ovary... Get the references and the transcripts for this programme from the Naked Scientists website