Memory

Most commonly found in old age, Alzheimer's disease affects personality, cognitive function and the gradual erosion of memory. Why do people get it?

Picture: Human brain, Credit: Getty Images

15 May 2000

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24 minutes

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Synaesthesia

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2000: How the World Sounded the Year You Were Born—BBC World Service Archive
The newly opened London Eye, the making of saints and predicting rainfall using stars

BBC World Service Archive

This programme was restored as part of the World Service archive project