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Liz Bonnin explains how cells turn cancerous by blowing high-tech bubbles, and Jem Stansfield builds a radiotherapy gun.
Jem Stansfield, Liz Bonnin and Maggie Philbin investigate how close Britain might get to running out of electricity.
Liz Bonnin sees how big data monitors Rolls Royce jet engines, and Jem Stansfield creates a low-tech computer system.