The Saab seethed off into the night. Arthur watched it go, as stunned as a man might be who, having believed himself to be totally blind for five years, suddenly discovers that he had merely been wearing too large a hat.

Yes it is,' said the Professor. 'Wait—' he motioned to Richard, who was about to go out again and investigate— 'let it be. It won't be long.' Richard stared in disbelief. 'You say there's a horse in your bathroom, and all you can do is stand there naming Beatles songs?' The Professor looked blankly at him.

Arthur felt happy. He was terribly pleased that the day was for once working out so much according to plan. Only twenty minutes ago he had decided he would go mad, and now here he was already chasing a Chesterfield sofa across the fields of prehistoric Earth.

Time, we know, is relative. You can travel light years through the stars and back, and if you do it at the speed of light then, when you return, you may have aged mere seconds while your twin brother or sister will have aged twenty, thirty, forty or however many years it is, depending on how far you traveled. This will come to you as a profound shock, particularly if you didn't know you had a twin brother or sister.

I can see we're in for a fabulous evening's apocalypse.

The system of life on this planet is so astoundingly complex that it was a long time before man even realized that it was a system at all and that it wasn't something that was just there.

The teacher usually learns more than the pupils. Isn't that true? "It would be hard to learn much less than my pupils," came a low growl from somewhere on the table, "without undergoing a pre-frontal lobotomy."