Our Changing World for Thursday 14 April 2016

9:45 PM.Mangroves have a mixed reputation, with some people thinking of them as weeds while others, including writer Kennedy Warne, value them for their ecosystem function and as a natural breakwater. Read more Audio

9:40 PM.Yellow-eyed penguins have hit their lowest numbers on mainland New Zealand since the early 1990s, and it's the result of a number of issues in the marine environment Read more Audio

9:36 PM.In a novel extension of the 'hygeine hypothesis', biologists argue we should save the parasites of endangered species for the sake of their host's immune system. Read more Audio

9:20 PM.Dementia researchers are looking for people with mild cognitive impairment for a longitudinal study to explore how Alzheimer's Disease develops from early stages of memory loss. Read more Audio

9:06 PM.Smart socks and an ankle bracelet that uses small vibration motors might help us to retrain how we walk and stave off joint surgery Read more Audio