Serial killers, and sails on supertankers

In the news this week, how can we understand the motivations of serial killers? Also, we ask a dermatologist to outline the early signs of melanoma, and find out about the initiative to reduce carbon emissions from the shipping industry using aeroplane wings. Plus, water voles are being reintroduced in the Lake District - we hear from the site manager in charge. Like this podcast? Please help us by supporting the Naked Scientists