Our Changing World for Thursday 16 July 2015

As young people use screens more and more, public health researcher Sam Marsh is looking into how much food they are eating when using different media like computers and TVs. Read more Audio

9:34 PM.A new study in rats shows that the link between high salt intake and high blood pressure is caused by changes in the brain Read more Audio

9:20 PM.A baby colossal squid, studying under-ice algae in Antarctica, New Zealand sea lions, and a better fishing trawl net. Read more Video, Audio

9:06 PM.After more than a decade of cleaning up Auckland's waterways and removing 22 shipping containers full of rubbish, the Sea Cleaners Trust is ready to tackle the rest of our coastline. Read more Audio