Science commentator Siouxsie Wiles joins Kathryn to look at two new Covid-related study, including one that provides evidence of a mechanism by which climate change could've played a role in the emergence of Covid-19, a new study into coral bleaching that could have application for rebuilding coral reefs and a wearable system that can continually measure stress hormone in humans. Associate Professor Dr Siouxsie Wiles is the head of Bioluminescent Superbugs Lab at the University of Auckland.