The difference between us and a computer is that, the computer is blindingly stupid, but it is capable of being stupid many, many million times a second.

The seat received him in a loose and distant kind of way, like an aunt who disapproves of the last fifteen years of your life and will therefore furnish you with a basic sherry, but refuses to catch your eye.

There is a feeling which persists in England that making a sandwich interesting, attractive, or in any way pleasant to eat is something sinful that only foreigners do.

My absolute favourite piece of information is the fact that young sloths are so inept that they frequently grab their own arms and legs instead of tree limbs, and fall out of trees.

If the Universe came to an end every time there was some uncertainty about what had happened in it, it would never have got beyond the first picosecond. And many of course don't. It's like a human body, you see. A few cuts and bruises here and there don't hurt it. Not even major surgery if it's done properly. Paradoxes are just the scar tissue. Time and space heal themselves up around them and people simply remember a version of events which makes as much sense as they require it to make.

A mobile phone needs a manual in the way that a teacup doesn't

Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is.