Socially responsible bats, indoor light and clues in tree rings

Science commentator Siouxsie Wiles joins Kathryn to talk about how vampire bats physically distance when sick, how researchers have developed environmentally friendly materials that could harvest energy from indoor light to power wireless smart devices and massive explosions of energy light-years from Earth may have left traces in tree rings. Associate Professor Dr Siouxsie Wiles is the head of Bioluminescent Superbugs Lab at the University of Auckland.