Chris Smith and the Naked Scientists find out how exercise on your terms can stave off junk food cravings and why spacecraft engineers helped design your next packet of crisps. Plus, find out who won this year's Nobel Prize for Chemistry, Physics and Physiology, and why. Download the podcast for part two featuring the latest breakthroughs on replacement retinas and how work to create an artificial pancreas could be a game changer in the fight against diabetes. bbc.co.uk/podcasts/5live.