Earth: The Power of the Planet From Sunday 6 January, 10pm on BBC Four
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.
Elsewhere on bbc.co.uk
UK rock's greatest hits You don't need to travel half way round the world to see great geology. Iain Stewart reveals his favourite formations from the UK.
Planet Earth Explorer Explore the wild and beautiful in the most extreme and unexplored corners of the world with our interactive Flash video player (for UK users only).
Hot Topics: Volcanoes It's estimated that one in ten of the world's population lives within 'danger range' of volcanoes, nature's most awesome and terrifying phenomena.
Walks Through Time See the power of the planet for yourself and choose from 57 specially devised geological walks around the UK.
