This week, from iPod to iRod as a man's taste for music turns him into a human lightning conductor, why penguins are picky eaters, and better biopsies - why doctors are attracted to a new magnetic cancer detection system. Also a fuel made from fructose that packs a punch like petrol, we find out how to make hydrogen on demand using aluminium, and grow your own gas - do we have enough land to grow our energy in future? Plus, in Kitchen Science, we turn vegetable oil into biodiesel and ask a white van man to test it... Like this podcast? Please help us by supporting the Naked Scientists