A researcher discusses a trip to a North Korean volcano, and in the wake of rising cases of whooping cough we explore the impact of vaccinations.

With the Rosetta probe now wide awake and on its way to intercept and land on a comet, we also talk to Chris Carr who has been involved in the project since the mid-1990s.

The podcast is presented by Gareth Mitchell, a lecturer on Imperial's Science Communication MSc course and the presenter of Click Radio on the BBC World Service, with contributors from the Research Communications team and news intern Marion Ferrat.

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News: catalytic convertors and mixing art and science – how the efficiency of catalytic convertors is increasing, whilst costs are decreasing, and hear more about Imperial Fringe: Arts Experiment 2.0 where student societies will team up with Imperial researchers to blur the line between art and science.

Awaking Rosetta – Chris Carr discusses his involvement in the European Space Agency Rosetta mission, and tells us why it is so important to study comets.

Vital vaccinations – In the wake of increased cases of whooping cough in the UK, US and Australia, news intern Marion Ferrat speaks to Beate Kampmann, Professor of Paediatric Infection and Immunity, to find out just how effective vaccinations are.

Explosive eruptions – Dr James Hammond, Research Associate in the Department of Earth Science & Engineering, tells us about a recent trip to a volcano in North Korea which was responsible for one of the largest eruptions in the last 2000 years.