Is there life on Mars? NASA researcher John Mather, awarded the Nobel Prize in Physics 2006 for mapping the traces of the first light emitted by the young universe, believes that where there’s water, there’s likely to be life. And he thinks that the chances of finding water on Mars are high - so reasons that signs of life on the planet may well be found, and during our lifetime too. In this conversation he also discusses how the new James Webb Space Telescope, ready for launch 2018, will provide a deeper look into space, even allowing us to detect the presence of water on planets orbiting suns other than our own.