Every atom you possess has almost certainly passed through several stars and been part of millions of organisms on its way to becoming you. We are each so atomically numberous and so vigorously recycled at death that a significant number of our atoms-up to a billion for each of us, it has been suggested-probably once belonged to Shakespeare. A billion more each came from Buddha and Genghis Khan and Beethoven, and any other historical figure you care to name.

It is a curious feature of our existance that we come from a planet that is very good at promoting life but even better at extinguishing it.

The taipan is the one to watch out for. It is the most poisonous snake on Earth, with a lunge so swift and a venom so potent that your last mortal utterance is likely to be: "I say, is that a sn--

When the poet Paul Valery once asked Albert Einstein if he kept a notebook to record his ideas, Einstein looked at him with mild but genuine surprise. "Oh, that's not necessary," he replied . "It's so seldom I have one.

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. As humans we are doubly lucky, of course: We enjoy not only the privilege of existence but also the singular ability to appreciate it and even, in a multitude of ways, to make it better. It is a talent we have only barely begun to grasp.

I come from Des Moines. Someone had to.

English grammar is so complex and confusing for the one very simple reason that its rules and terminology are based on Latin, a language with which it has precious little in common.