This week, are we on the verge of being able to print a new kidney or liver? And will every home soon have a machine in it to make medicines so we don't need to head off to the chemist for a dose of antibiotics? This is the world of 3D printing and we'll show you what it promises to deliver... Plus, in the news, is fracking contaminating underground water or is it just leaky pipes? And a new breakthrough therapy for multiple sclerosis... Like this podcast? Please help us by supporting the Naked Scientists