Gemma Flynn just wants an easy life. Vying for her attention are philosopher Michael Wheeler and roboticist Eli Sheppard, with Simon Watt keeping score. We get a helping gene or two from the scrotum frog, and find out about the evolution of the haircut. Our theme music was written and performed by Laurence Owen. Graphics by Theo Weedon, web design by Ian Bridgeman and support from the Wellcome Trust. The producer is Rachel Wheeley.
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