'Clues' part 2 - Watching penguins

Dr Tom Hart runs the 'Penguin Watch' project that gives people from all over the world the chance to help researchers keep tabs on what penguins on Antarctica are up to. This gives researchers a good understanding of how well penguins are doing. They can also use other techniques to fully understand what sorts of things affect penguin populations. In this podcast Tom Hart discusses how all this information can be pieced together, and ultimately might help inform policies to help protect penguin populations.