I’m a mathematician and am constantly amazed that the world around us can be described mathematically. All it takes is a combination of a handful of simple mathematical concepts. I’m insatiably curious, and I want to understand how things fit together, so, I get involved in many kinds of scientific problems — everything from the changing statistics of extreme rainfall, to the behavior of life at the scale of molecules, to analyzing voice and speech recordings for forensics. But there’s one project, on Parkinson’s disease that has occupied me for the last seven years. I fell into it almost by accident.