Hugh Dennis judges ideas for human enhancement from Professor Alice Roberts, Marcus du Sautoy and the studio audience at Glastonbury festival. Simon Watt officiates with offerings from Mother Nature's buffet table.In this episode we discuss transcranial magnetic stimulation, how we know bees are good at maths and why there's never been a giraffe at the International Space Station.Our theme music was written and performed by Laurence Owen. Graphics are by Theo Weedon and our website was designed by Ian Bridgeman. Level Up Human is produced by Rachel Wheeley and supported by the Wellcome Trust.For more information, go to www.leveluphuman.com

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