Science correspondent Allan Blackman

Science correspondent Allan Blackman joins Kathryn to discuss how a 15-year-old study claiming that a microorganism can thrive on the toxic element arsenic has been retracted by the journal Science - why did chemists and biologists have their concerns about it? A new study turns claims of eggs' effect on cholesterol on its head and a start-up energy company Marathon Fusion claims it can turn an isotope of mercury into gold, while creating clean energy via nuclear fusion... Allan Blackman is a Professor of Chemistry, School of Science, Auckland University of Technology.