Associate Professor Kendal McGuffie from the Physics department at UTS, tells Ian Woolf about tracking the movement of water by weight to find out how forests use water and effect the climate. Marc West phones Dr Christopher Pettigrew from Cork University in Ireland to find out how to apply for the American Association for the Advancement of Science PhD interprative dance competition. Kalvin Ng bring us the latest news about bird flu. Presented by Kalvin Ng and produced by Ian Woolf.