As Irving Good realised in 1965, machines with superhuman intelligence could repeatedly improve their design even further, triggering what Vernor Vinge called a 'singularity.'
I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming.
There could be shadow galaxies, shadow stars, and even shadow people.
The human race may be the only intelligent beings in the galaxy.
The Paralympic Games is about transforming our perception of the world.
I think we have a good chance of surviving long enough to colonize the solar system.
I believe the universe is governed by the laws of science. The laws may have been decreed by God, but God does not intervene to break the laws.
The cyclic universe theory predicts no gravitational waves from the early universe.
Because there is a law such as gravity, the universe can and will create itself from nothing.
My three children have brought me great joy.
I grew up thinking that a research scientist was a natural thing to be.
The voice I use is a very old hardware speech synthesizer made in 1986. I keep it because I have not heard a voice I like better and because I have identified with it.
I believe in universal health care. And I am not afraid to say so.
I hope I have helped to raise the profile of science and to show that physics is not a mystery but can be understood by ordinary people.
I wouldn't be here today if it were not for the NHS. I have received a large amount of high-quality treatment without which I would not have survived.
I am in touch with a company that hopes to replicate my voice. However, they are not replicating my original voice - if they did that, I would sound like a man in his 20s, which would be very strange! They are actually trying to replicate the synthesizer that sits on my wheelchair.
Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.
I have visited Japan several times and have always been shown wonderful hospitality.
I don't think the human race will survive the next thousand years, unless we spread into space.
I think the human race doesn't have a future if it doesn't go into space.