Our Changing World for Thursday 5 November 2015

9:45 PM.As NASA considers a mission to Mars, it is investigating what happens to an astronaut's brain during long-duration space travel. Read more Audio

9:35 PM.Gaia Vince is the author of Adventures in the Anthropocene, which won the 2015 Winton Science Book Prize. Read more Audio

9:20 PM.The WWF Conservation Innovations awards recognise the best ideas that help conservation projects to succeed. Read more Audio

9:06 PM.Whaingaroa Harbour Care have planted more than 1.4 million native plants along streams around Raglan,and the harbour is much cleaner as a result Read more Audio

9:05 PM.A tribute to Bill Ballantine, New Zealand's tireless campaigner for the protection of our oceans, who died this week at the age of 78. Read more Audio, Gallery