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The changes in the brain during the growth and development of a baby into an adult are explored in this edition. Professor Greenfield looks at how little of the fine structure of our brains is predetermined at birth, how the connections between nerves are constantly changing in response to what we encounter in the outside world.

She explains her view that learning, memory and even the process of becoming a unique individual should all be seen as a restless brain adapting minute by minute to the environment it encounters. Life is about how the world leaves its mark on us.

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Britain's leading female neuroscientist gives a personal view of what it is about their brains that makes humans think, act and feel the way they do, in a new series. Professor Susan Greenfield, Director of the Royal Institution and Professor of Pharmacology at Oxford University, explores the grand themes emerging from the latest brain research. 'Why do we think the way we do, what makes us who we are? Our hopes, our fears, our thoughts, our dreams are all somehow hidden away inside our heads.' Susan explains why she believes all aspects of human experience will eventually be explained in terms of the physical processes of the brain. 'I'm convinced there isn't a single aspect of our lives that doesn't reside in the sludgy mass of our brain cells.

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