It isn't easy to become a fossil. ... Only about one bone in a billion, it is thought, becomes fossilized. If that is so, it means that the complete fossil legacy of all the Americans alive today - that's 270 million people with 206 bones each - will only be about 50 bones, one-quarter of a complete skeleton. That's not to say, of course, that any of these bones will ever actually be found.

Anyone who has read my books will know that I don't tend to use guides when I am travelling. It's not a pride thing, but it is certainly a fact.

I'm not a natural story-teller. Put a keyboard in front of me and I'm fine, but stand me up in front of an audience and I'm actually quite shy and reserved.

Clearly, some time ago makers and consumers of American junk food passed jointly through some kind of sensibility barrier in the endless quest for new taste sensations. 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.

I mused for a few moments on the question of which was worse, to lead a life so boring that you are easily enchanted, or a life so full of stimulus that you are easily bored.

We are so used to the notion of our own inevitability as life's dominant species that it is hard to grasp that we are here only because of timely extraterrestrial bangs and other random flukes. The one thing we have in common with all other living things is that for nearly four billions years our ancestors have managed to slip through a series of closing doors every time we needed them to.

Before, prior to. There is no difference between these two except length and a certain affectedness on the part of 'prior to.' To paraphrase Bernstein, if you would use 'posterior to' instead of 'after,' then by all means use 'prior to' instead of 'before.