The increase of disorder or entropy with time is one example of what is called an arrow of time, something that distinguishes the past from the future, giving a direction to time.

I want my books sold on airport bookstalls.

When I was first diagnosed with ALS, I was given two years to live. Now 45 years later, I am doing pretty well.

I do not believe in a personal God.

Why are we here? Where do we come from? Traditionally, these are questions for philosophy, but philosophy is dead.

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. By contrast, computers double their speed and memories every 18 months. 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.

When something is made idiot proof, they will just make better idiots.