You don't need a science degree to understand about science. You just need to think about it.

If a potato can produce vitamin C, why can't we? Within the animal kingdom only humans and guinea pigs are unable to synthesize vitamin C in their own bodies. Why us and guinea pigs? No point asking. Nobody knows.

Of all the things I am not very good at, living in the real world is perhaps the most outstanding.

Hardly anyone ever leaves. This is because Des Moines is the most powerful hypnotic known to man. Outside town there is a big sign that says, WELCOME TO DES MOINES. THIS IS WHAT DEATH IS LIKE. There isn't really. I just made that up. But the place does get a grip on you.

It is unthinkable to have a British countryside that doesn't have actual functioning farmers riding tractors, cows in fields, things like that.

I ordered a coffee and a little something to eat and savored the warmth and dryness. Somewhere in the background Nat King Cole sang a perky tune. I watched the rain beat down on the road outside and told myself that one day this would be twenty years ago.

So, if people didn’t settle down to take up farming, why then did they embark on this entirely new way of living? We have no idea – or actually, we have lots of ideas, but we don’t know if any of them are right. According to Felipe Fernández-Armesto, at least thirty-eight theories have been put forward to explain why people took to living in communities: that they were driven to it by climatic change, or by a wish to stay near their dead, or by a powerful desire to brew and drink beer, which could only be indulged by staying in one place.