For seven and a half million years, Deep Thought computed and calculated, and in the end announced that the answer was in fact Forty-two - and so another, even bigger, computer had to be built to find out what the actual question was.

But the reason I call myself by my childhood name is to remind myself that a scientist must also be absolutely like a child. If he sees a thing, he must say that he sees it, whether it was what he thought he was going to see or not. See first, think later, then test. But always see first. Otherwise you will only see what you were expecting.

The invention of the scientific method and science is, I'm sure we'll all agree, the most powerful intellectual idea, the most powerful framework for thinking and investigating and understanding and challenging the world around us that there is, and it rests on the premise that any idea is there to be attacked. If it withstands the attack then it lives to fight another day and if it doesn't withstand the attack then down it goes. Religion doesn't seem to work like that.

I've never understood all this fuss people make about the dawn. I've seen a few and they're never as good as the photographs, which have the additional advantage of being things you can look at when you're in the right frame of mind, which is usually around lunchtime.

We live in strange times. We also live in strange places, each in a universe of our own. The people with whom we populate our universe are the shadows of whole other universes intersecting with our own.

And wow! Hey! What's this thing coming towards me very fast? Very very fast. So big and flat and round, it needs a big wide sounding word like... ow... ound... round... ground! That's it! That's a good name - ground! I wonder if it will be friends with me?

David Attenborough has said that Bali is the most beautiful place in the world, but he must have been there longer than we were, and seen different bits, because most of what we saw in the couple of days we were there sorting out our travel arrangements was awful. It was just the tourist area, i.e. that part of Bali which has been made almost exactly the same as everywhere else in the world for the sake of people who have come all this way to see Bali.