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Clocks in our DNA

Scientists have discovered two genetic 'clocks' in our DNA that can predict how fast we'll age and whether or not we'll get cancer. It's all down to the rate of mutation - which happens over time in all our cells. Professor Mike Stratton is Director of the Wellcome Trust Sanger Institute in Cambridge.

(Photo: Part of a DNA double helix. Credit: Science Photo Library)

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2 minutes