LEAH:The world has just changed, reality is not what we think. NARRATOR:'Welcome to the plot of Dennis Kelly's 'DNA'. MARK:Someone pegged a stone at him. Not to hit him, just for the laugh.

The summary highlights vital developments in radiology, plastic surgery, the discovery of penicillin, DNA and the formation ... for teaching KS3 and KS4/GCSE History in England, Wales and Northern ...