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.

got stuck?work on something else.

Stephen Hawking

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833 Using e-mail, I can communicate with scientists all over the world.
788 Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.
786 Observations indicate that the universe is expanding at an ever increasing rate. It will expand forever, getting emptier and darker.
799 My work and my family are very important to me.
815 In Britain, like most of the developed world, stem-cell research is regarded as a great opportunity. America will be left behind if it doesn't change policy.

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