Dan Schreiber joins Simon Watt and a panel of scientists to work out how to improve humans with the help of a live studio audience at SMASHfest. With Sophie Scott and Frank Swain. The panel discuss lesbian lizards, the sleep/wake cycle and why birds don't have teeth. 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. For more information, go to www.leveluphuman.com
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