Plankton light shows and the jacuzzi bug

Science correspondent Siouxsie Wiles joins Kathryn to explain why researchers believe the bioluminescence of plankton is a defence mechanism, how your gut bacteria could determine whether Parkinson's drugs will work for you and a new species of bacterium that likes to live in warm water has been identified after it caused an outbreak of infections in women undergoing breast implant surgery. The culprit? Their surgeon's jacuzzi.

Associate Professor Dr Siouxsie Wiles is the head of Bioluminescent Superbugs Lab at the University of Auckland.