Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.

nuclear weapons threaten the survival of the human race

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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