What will it take to stop the great teacher resignation?

The federal government has announced a new campaign encouraging more Australians to ‘be that teacher.’ But with teacher shortages becoming more common across the country, what bigger changes are necessary to attract new teachers and retain the ones currently working? Plus, researchers are working to understand precisely how those kilos of microbes affect our health, but they're also seeing a significant drop in the diversity of that microbiome. A new documentary examines the research of leading scientists on the human microbiome, The Invisible Extinction. Scientists Gloria Dominguez-Bello and Marty Blaser explain their research.