Science commentator Siouxsie Wiles joins Kathryn to look at the modelling that shows Covid-19 may have emerged as early as October in China; how eye colour isn't just a simple genetic trait after all, and the spit test that's being developed that could quickly diagnose concussion in rugby players.
Associate Professor Dr Siouxsie Wiles is the head of Bioluminescent Superbugs Lab at the University of Auckland.
