This week, the latest breakthroughs in cancer including blood tests to pick up the disease much earlier, new genetic treatments to trigger tumours to kill themselves, and a laser technique to zap cancers in hard-to-reach places. Plus, in the news, why working the night shift can curb your intellect, a super-enzyme that could cut millions off energy bills and the gut bacteria that keep you trim... Like this podcast? Please help us by supporting the Naked Scientists