Mars

Melvyn Bragg and guests discuss the planet Mars. Named after the Roman god of war, Mars has been a source of continual fascination. It is one of our nearest neighbours in space, though it takes about a year to get there. It is very inhospitable with high winds racing across extremely cold deserts. But it is spectacular, with the highest volcano in the solar system and a giant chasm that dwarfs the Grand Canyon.For centuries there has been fierce debate about whether there is life on Mars and from the 19th century it was even thought there might be a system of canals on the planet. This insatiable curiosity has been fuelled by writers like HG Wells and CS Lewis and countless sci-fi films about little green men.So what do we know about Mars - its conditions, now and in the past? What is the evidence that there might be water and thus life on Mars? And when might we expect man to walk on its surface?

→ Play on BBC Sounds website

Guests

• John Zarnecki 2 episodes
  Professor of Space Science at the Open University
• Colin Pillinger No other episodes
  Professor of Planetary Sciences at the Open University
• Monica Grady 9 episodes
  Professor of Planetary and Space Sciences at the Open University

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Programme ID: b00772rr

Episode page: bbc.co.uk/programmes/b00772rr

Auto-category: 520 (Astronomy and allied sciences)

Hello (First sentence from this episode)

Hello, today we'll be discussing the red planet.