| Summary: | How might rare medical conditions be a force for good? This probing documentary reveals the extraordinary people who are helping international scientists make medical breakthroughs. A woman who can smell Parkinson's disease helps doctors find a new way to diagnose this debilitating condition. A pioneering stem cell trial provides hope for those with multiple sclerosis. And a patient's inability to sense pain inspires a new generation of pain relief. The World's Most Extraordinary People meets the scientists and patients at the heart of these stories - and takes us right to the edge of scientific understanding. This time, we meet a man who feels no pain, a woman who can smell Parkinson's disease, a man who can remember every face he has ever seen and a survivor of a head injury who woke up to find he could suddenly play the piano. These remarkable cases are shedding new light on one of the most mysterious parts of the human body: the brain.
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