Our Changing World for Thursday 30 October 2014

9:48 PM.This is the final mystery sound, out of 18 that make up the 2013-14 opening theme for Our Changing World Read more Audio

9:47 PM.Soil scientists warn that we'll need to produce more than 50 per cent more food by 2050, while large areas of fertile land disappear under cities. Read more Audio

9:46 PM.Aptamers and gold nanoparticles are the basis of a novel sensor for detecting oestrogen in the environment Read more Audio

9:30 PM.Amy Yewdall is trying to create functional nanowires from self-stacking protein rings which may one day be used in nanomachines Read more Audio

9:20 PM.Self setting traps that only need to be checked every few months are another tool in the fight against introduced predators such as rats and stoats Read more Audio