Our Changing World for Thursday 23 March 2006

9:46 PM.How much sleep we need to function, and what happens as more and more of us cut down on shut-eye because we get too busy. Audio

9:35 PM.Victor Watkins, animal protection campaigner, on the practise of bear farming in Asia, and bear dancing in India and Europe. Audio

9:20 PM.American nutritionist Paul La Chance says we have produced a miracle food here in New Zealand, the kiwifruit. Audio

9:06 PM.Dean Williams explores machines that can smell with physical chemist Richard Newcomb. Audio