BTW his books are funnny and he works hard not to make you feel stupid. The latest book of his I read was called "Black Holes and Baby Universes". There HAS to be a caption for the photo in that title but I'm afraid to left my mind wander there.
One telling chapter described how he and his wife were visiting Geneva. He contracted pneumonia and the doctors didn't want to treat him since he was terminal anyway. They had to fly back to Britain to get treated. This was in 1985 and all his work since would have been aborted by a doctor's "quality of life judgement". The slippery slope of euthanasia and cost-focused socialized medicine are linked byu this concept.