Our Changing World for Thursday 26 February 2015

9:46 PM.Botanist and bird watcher John Ogden is passionate about making Great Barrier Island pest-free - and keeping an eye on his local shorebirds Read more Audio

9:34 PM.A scanning electron microscope uses a focused beam of electrons to produce images and Ruth Knibbe demonstrates how it works Read more Audio

9:20 PM.Learning the complex secrets of photosynthesis could lead to improved solar panels, efficient ways of producing hydrogen from water and more productive plants Read more Audio

9:06 PM.A fieldtrip through Mead Stream Gorge, north of Kaikoura, which provides a continuous record of 80 million years of geological history. Read more Audio