Our Changing World for Thursday 28 August 2014

9:06 PM.Stable isotope analysis of sea lion and fur seal hair and bones is showing how marine food webs have changed over time Read more Audio

9:20 PM.Rob DeConto is an ice-sheet and climate modeller, and he warns that if polar ice sheets melt global sea level could rise by 60 metres Read more Audio

9:34 PM.Compounds made from a hallucinogenic party drug called Salvia divinorum could be the basis of new anti-addiction treatments Read more Audio

9:46 PM.An electronic device has been developed which uses echolocation to alert blind people to obstacles in the environment Read more Audio

9:47 PM.A discussion about the role of Antarctica's ice sheets in future sea-level rise, recorded during World Science Week New Zealand Audio

9:48 PM.The ninth mystery sound in the 2014-15 Our Changing World opening theme Read more Audio