Features Editor Elaine Bunting talks to Dee about going through violent Southern Ocean cold fronts, about the attrition of life on board and interviews Dr Keith Reed of the British Antarctic Survey about marine life in this extremely nutrient-rich part of the world.

Plus Nick Tasker of the UK Hydrographic Office explains that we know more about the moon and the rings of Saturn than we do about what’s on the sea floor in this part of the world. Click here to visit the Aviva Challenge website and listen.