"It is generally recognised that women are better than men at languages personal relations and multi-tasking but less good at map-reading and spatial awareness. It is therefore not unreasonable to suppose that women might be less good at mathematics and physics."
"The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza let alone cooking it."
"Time travel used to be thought of as just science fiction but Einsteins general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out."
"There is a real danger that computers will develop intelligence and take over. We urgently need to develop direct connections to the brain so that computers can add to human intelligence rather than be in opposition."
"It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes it was 29 years."
"The usual approach of science of constructing a mathematical model cannot answer the questions of why there should be a universe for the model to describe. Why does the universe go to all the bother of existing?"
"If we do discover a complete theory it should be in time understandable in broad principle by everyone. Then we shall all philosophers scientists and just ordinary people be able to take part in the discussion of why we and the universe exist."
"The whole history of science has been the gradual realization that events do not happen in an arbitrary manner but that they reflect a certain underlying order which may or may not be divinely inspired."
"I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. Weve created life in our own image."