Hugh Pickens writes writes: "Now aged 70, Prof Stephen Hawking, winner of 12 honorary degrees, a CBE and in 2009 awarded the Presidential Medal of Freedom, is an extraordinary man but what is perhaps most extraordinary about Hawking is how he has defied and baffled medical experts who predicted he had just months to live in 1963 when he was diagnosed with Motor Neurone Disease (MND), a disease that only 5% survive for more than a decade after diagnosis. Hawking started having symptoms shortly before his 21st birthday. At first they were mild — a bit of clumsiness and few unexplained stumbles and falls but, predictably, by the very nature of the disease, his incurable condition worsened. The diagnosis came as a great shock, but also helped shape his future. "Although there was a cloud hanging over my future, I found, to my surprise, that I was enjoying life in the present more than before. I began to make progress with my research, and I got engaged to a girl called Jane Wilde, whom I had met just about the time my condition was diagnosed," says Hawking. "That engagement changed my life. It gave me something to live for." Another important thing in Hawking's life has been his work and at the age of 70, Hawking continues working at the University of Cambridge and recently published a new book — The Grand Design. "Being disabled, or physically challenged, makes no difference to how my scientific colleagues treat me apart from practical matters like waiting while I write what I want to say." Finally the grandfather-of-three continues to seek out new challenges and recently experienced first-hand what space travel feels like by taking a zero-gravity flight in a specially modified plane. "People are fascinated by the contrast between my very limited physical powers, and the vast nature of the universe I deal with," says Hawking. "I'm the archetype of a disabled genius, or should I say a physically challenged genius, to be politically correct. At least I'm obviously physically challenged. Whether I'm a genius is more open to doubt.""