Our Changing World for Thursday 21 August 2014

9:47 PM.The eighth mystery sound from the 2012-13 Our Changing World opening theme Read more Audio

9:46 PM.Sugar is linked to a number of health issues, from diabetes to heart disease, and is found in large quantities in many kinds of foods Read more Audio

9:34 PM.Students from Aranui High Scool discuss Antarctica's role in the world's climate with scientists whose research is part of the Antarctic Time Travel exhibition Read more Audio

9:20 PM.As male zebrafish age their sperm quality declines and they become less attractive - but it's not all bad news for older dads Read more Audio

9:06 PM.Researchers are using brain activity to control robots and the technology may one day help patients with stroke or spinal injury Read more Audio