This week the hot topic is volcanos - there's so much more to them than ash clouds. And how the body language of our political leaders may affect the way we vote.

Walk the walk...

The televised Prime Ministerial Debates have put political leaders under closer scrutiny, both for their policies and their performance in public. Like it or not, we do judge by appearance and new research at Bangor University suggests that the way we move our limbs sends out signals about our health and thus our attractiveness as leadership material. Evolutionary psychologist Robin Kramer explains to Adam how the study was carried out and what it reveals.

Ashpocalypse..

You don't need to go to Iceland to find a volcano - they're on our doorstep right here in Wales. Don't expect an eruption any time soon though -or any ash clouds. Prof Richard Bevins, Keeper of Geology at the National Museum of Wales, talks about the volcanic history in Wales and Dr Tim Jones, Cardiff School of Earth and Ocean Sciences, considers the impact the dust from the ash cloud may have on our health.

Survival lessons

Despite the disruption it's caused, the volcanic eruption in Iceland over the last week can hardly be described as a disaster. Major humanitarian disasters like January's earthquake in Haiti, the Boxing Day tsunami and the Rwandan genocide, have long term implications for the communities involved. Some communities move on from the heartbreak and devastation much more quickly than others. Dr Alan Hawley, professor of Disaster Studies at the University of Glamorgan, joins the programme to discuss the psychology that shapes our reaction to these terrible events.