This week, we're exploring the science of Smart Materials - we discover a Super-Non-Stick coating that even honey wont stick to and flexible plastic paper with E-Ink that we-writes itself on demand. We learn how potatoes could form the basis of future plastics and a new way to think about 'bone china', as ceramics and polymers could replace your broken bones. Also, we discover where sea turtles spend their childhood, how a microRNA gene switch could put the brakes on the spread of cancer and how thousands of cases of breast cancer could be avoided without medication. Plus, in Kitchen Science, we show you how a simple cotton handkerchief can hold back a torrent of water!