Answering all your burning science, technology and medicine questions this week are Dr Chris, Dr Dave and Dr Phil, who look at why purifying seawater won't solve our water shortage problems, how 3D glasses work and whether a man on a meteor would have to hold on tight or sit back and soak up the stellar scenery. We'll also be receiving an update from Daniel Scuka at the European Space Agency on the Venus Express Mission, Professor Diana Liverman from Oxford University talks about how to turn down the heat on climate change, and in Kitchen Science Anna Lacey finds out why we hear strange voices when we play old records backwards...
Time is very much the essence of this week's show, as Professor Russell Foster from Imperial College London discusses the human body clock, where it is and how it gives our bodies a daily rhythm, Professor Karl-Arne Stokkan from Tromso University in Norway describes how reindeer body clocks adapt to twenty four hours of sunlight, Dr Alex Webb from Cambridge University talks about plant circadian rhythms and how they differ from animals, and Anna Lacey interviews Professor Cynthia Kenyon from the University of California, San Francisco about how to survive longer and cheat time.