Machines built by human beings they will function correctly if we provide them with a very specific environment. But if that environment is changed they won't function at all.

If you think the technology is infeasible, you don't worry about what it might do and what its potential is.

Nanotechnology is an idea that most people simply didn't believe.

One of the concepts essential to molecular manufacturing is that of a self-replicating manufacturing system. That concept has lagged behind in its acceptance.

Because of technological limits, there is a certain amount of food that we can produce per acre. If we were to have intensive greenhouse agriculture, we could have much higher production.

What we refer to as 'death' is just a set of symptoms that have proven resistant to treatment.

One of the things that we can say with confidence is that we will have much lighter, much stronger materials, and this will reduce the cost of air flight, and it will reduce the cost of rockets.