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Jim al-Khalili talks to the former chief scientific advisor, Robert May about restoring public trust in science in the wake of the BSE crisis and at the height of the anti-GM campaigns of the mid-nineties. If he were a species of plant, Bob May says he would be the "weedy type", moving as he has into new fields of science and proliferating rapidly, rather than a more established, specialised variety. He has applied mathematics first to physics, then ecology and, most recently, to banking.

Producer: Anna Buckley.