 Welcome to Science in Action from the BBC World Service with me, Roland Pease. This week, we've caves on the moon, a tiny solar-powered flying drone, and a call for a redoubling of the effort to halt malaria in Africa. If you were to interview me five years to come, I would probably not take the interview because I would be shedding tears all the time. We need to take the steps pre-emptively to make sure we don't reach to a stage where we have massive people in Africa dying because...