“Now they are a little like those desperate junkies who have tried every known drug and are finally reduced to mainlining toilet bowl cleanser in an effort to get still higher.”

At a stroke, the American government closed down the fifth largest industry in the United States – alcohol production – and just handed it to criminals – a pretty remarkable thing to do.

My favourite fellow of the Royal Society is the Reverend Thomas Bayes, an obscure 18th-century Kent clergyman and a brilliant mathematician who devised a complex equation known as the Bayes theorem, which can be used to work out probability distributions.

If you believe in god, it’s much more fantastic to believe that he created this universe billions of years ago and set in motion this long train of activities that eventually resulted in us. I think that’s so much more satisfying, more thrilling, than the idea that it was all done in seven days.

Ordnance Survey maps, tea and crumpets, summer showers and foggy winter evenings – every bit of it.

So that buildings and structures you normally pass without a glance suddenly become arresting, even beautiful? Well, they seem to have that light in Australia nearly all the time.

I love everything about motels. I can’t help myself. I still get excited every time I slip a key into a motel room door and fling it open.

When you sit in a chair, you are not actually sitting there, but levitating above it at a height of one angstrom (a hundred millionth of a centimetre), your electrons and its electrons implacably opposed to any closer intimacy.

It is a slightly arresting notion that if you were to pick yourself apart with tweezers, one atom at a time, you would produce a mound of fine atomic dust, none of which had ever been alive but all of which had once been you.

I’m quite certain that if the rest of the world vanished overnight and the development of cricket were left in Australian hands, within a generation, the players would be wearing shorts and using the bats to hit each other, and the thing is, it’d be a much better game for 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.

But I got a great deal else from the experience. I learned to pitch a tent and sleep beneath the stars. For a brief, proud period I was slender and fit. I gained a profound respect for the wilderness and nature and the benign dark power of woods.

That is jargon – the practice of never calling a spade a spade when you might instead call it a manual earth-restructuring implement – and it is one of the great curses of modern English.

Energy is liberated matter, matter is energy waiting to happen.

Consider the Lichen. Lichens are just about the hardiest visible organisms on Earth, but the least ambitious.

Most of what has lived on Earth has left behind no record at all.

If this book has a lesson, it is that we are awfully lucky to be here-and by ‘we’ I mean every living thing. To attain any kind of life in this universe of ours appears to be quite an achievement.