Our Changing World for Thursday 19 November 2015

9:47 PM.The prickly dogfish is a small deepsea shark with very rough skin. Shark skin is made from 'dermal denticles' which are like teeth Read more Audio

9:46 PM.The Fishes of New Zealand is the first definitive guide to all of our freshwater and marine fishes since 1872, and it includes more than 1260 species Read more Audio, Gallery

9:34 PM.Science historian Simon Nathan discusses his biography of Sir James Hector, New Zealand's first government scientist. Read more Audio

9:20 PM.NIWA has produced some electronic field guides to coastal creatures, including one on crabs Read more Audio

9:06 PM.Material scientist Martin Allen has developed wearable UV sensors that allow school children to monitor their exposure to the sun's ultra-violet radiation. Read more Audio