Dr Iain Stewart tells the story of how Earth works and how, over the course of 4.6 billion years, it came to be the remarkable place it is... More >
Dr Iain Stewart tells the story of how Earth works and how, over the course of 4.6 billion years, it came to be the remarkable place it is today.
Aired:
December 18, 2007
Rare Earth
Iain looks at the big picture of Earth's place in space. It's taken four and a half billions years and several great catastrophes to turn it from a barren rock to the unique planet we know today.
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