In this issue of the eLife podcast we discuss how chimpanzees use conceptual metaphors, the hyperactivation of spermatozoa, the use of bacteria to estimate the time of death, stem cells and smoking, and a new type of bacteria. Get the references and the transcripts for this programme from the Naked Scientists website

In this issue of the eLife podcast we discuss how flatworms can grow new heads and tails, how photosynthesis has evolved over time, social interactions between mice, the properties of "undead" cells, and interactions between steroids and genes. Get the references and the transcripts for this programme from the Naked Scientists website

The cocktail party effect and how the brain decides which sounds to attend to, genes dismissed as dead relics turn out to play significant roles in inflammation, iPS cells reproduce degenerative retinal disease, the genetic responses to flu jabs, and the discovery of stem cells in schistosomes... Get the references and the transcripts for this programme from the Naked Scientists website

How plants do molecular mathematics to thyme their starch consumption, how cancers evolve resistance to chemotherapy and how to combat it, how the retina and cornea keep themselves clear of blood vessels, watching T cell receptors in real time and do governments listen to scientists? Get the references and the transcripts for this programme from the Naked Scientists website

How multicellular life began, museum specimens surrender the identity of the bug behind the Irish potato famine, the Hepatitis B and D virus receptor discovered, why fog clouds driver judgement and where nucleosomes came from. Get the references and the transcripts for this programme from the Naked Scientists website