Cracking cancer's code, and the cow that scratches its back

Coming up, a world-first gene cancer database is launched. How might it help us gain a better understanding of how disease develops? Plus, the link between vitamin D deficiency and respiratory infections, Austria's back-scratching cow, and SpaceX carries out its latest launch of Starlink satellites... Like this podcast? Please help us by supporting the Naked Scientists (thenakedscientists.com/donate)