Space Boffins Richard Hollingham and Sue Nelson go to a comet, Mars and into space. This month's podcast is from the Open University's Rosetta mission room and includes NASA's Curiosity rover mission specialist Daniel Limonadi, British space scientist Maggie Aderin Pocock and Anousheh Ansari, the first Iranian woman in space. Meanwhile studio guests Dr Dan Andrews and Professor Ian Wright explain why their Ptolemy instrument on board Rosetta's comet chasing mission is not a burglar alarm (even if it looks like one) but an advanced technology, state-of-the-art electronic nose. Like this podcast? Please help us by supporting the Naked Scientists