Computers double their performance every month.

Just like a computer, we must remember things in the order in which entropy increases. This makes the second law of thermodynamics almost trivial. Disorder increases with time because we measure time in the direction in which disorder increases. You can't have a safer bet than that!

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

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

When I hear of Schrödinger's cat, I reach for my pistol.

It is generally recognised that women are better than men at languages, personal relations and multi-tasking, but less good at map-reading and spatial awareness. It is therefore not unreasonable to suppose that women might be less good at mathematics and physics.

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.