Michael Mosley takes a fascinating journey around the human body to find out how it works. This time, he meets a tremors sufferer and investigates cold water swimming.
Michael demonstrates what stress does to our bodies, meets a woman who learned to see again by using echolocation, and answers the age old question: What's in our farts?
Michael reveals the best ways to keep our brains young. Plus a life-saving procedure on dangerous blood clots, and the secret of long-distance running into your 70s.
