It matters if you don't just give up.

If we ever do find a complete theory of the universe, it would be a great triumph of human reason but it wouldn't leave much for us to do. We need an intellectual challenge.

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.

The moment you understand the whole Universe, is the moment you slightly begin to understand the way God's mind works

With genetic engineering, we will be able to increase the complexity of our DNA, and improve the human race. But it will be a slow process, because one will have to wait about 18 years to see the effect of changes to the genetic code.

Religion believes in miracles, but these aren't compatible with science.

Science can explain the universe without the need for a Creator.