Our Changing World for Thursday 20 March 2014

9:46 PM.Ketamine, an anaesthetic and party drug, is being trialled in Sydney as a treatment for major depression Read more Audio

9:34 PM.Conservationist Gerry McSweeney talks about old growth forest and using 1080 for biodiversity restoration at a landscape scale Read more Audio

9:20 PM.Bacteria are being used as factories to produce tiny biobeads to mimic diseases in the body for vaccines Read more Audio

9:06 PM.Volcanologists have been drilling deep into Rangitoto Island's lava to piece together its eruption history Read more Audio