This week on the Award Winning Naked Scientists we find out about stem cells and cloning. We discuss the elusive 'stemness' that allows cells to specialise, and learn about cloning in the post-Dolly the sheep era. We also find out how genetics has revealed that Neanderthals were redheads, how soap affects shoals of fish and some turtles come equipped with anti-roll bars. We also pay a visit to the Manchester Science Festival for a chat with Johnny Ball, and in Kitchen Science, we "clone at home" and find out the future of the humble banana.