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The scary truth about gene editing in sport
When one's own genetic make-up and hard work aren't enough in sport, people are now turning to chemical enhancement. Andrew Marr talks to Jonathan Maitland, who has looked at doping in sport for his latest play, polar scientist and explorer Felicity Aston, Dr Adam Rutherford and Ed Yong.
First broadcast on Start the Week, 24 October 2016.
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