“Three hundred types of mussel, a third of the world’s total, live in the Smokies. Smokies mussels have terrific names, like purple wartyback, shiny pigtoe, and monkeyface pearlymussel. Unfortunately, that is where all interest in them ends. Because they are so little regarded, even by naturalists, mussels have vanished at an exceptional rate. Nearly half of all Smokies mussels species are endangered; twelve are thought to be extinct.This ought to be a little surprising in a national park. I mean it’s not as if mussels are flinging themselves under the wheels of passing cars. Still, the Smokies seem to be in the process of losing most of their mussels. The National Park Service actually has something of a tradition of making things extinct. Bryce Canyon National Park is perhaps the most interesting-certainly the most striking-example. It was founded in 1923 and in less than half a century under the Park Service’s stewardship lost seven species of mammal-the white-tailed jackrabbit, prairie dog, pronghorn antelope, flying squirrel, beaver, red fox, and spotted skunk. Quite an achievement when you consider that these animals had survived in Bryce Canyon for tens of millions of years before the Park Service took an interest in them. Altogether, forty-two species of mammal have disappeared from America's national parks this century.”

“At the foot of the mountain, the park ended and suddenly all was squalor again. I was once more struck by this strange compartmentalization that goes on in America -- a belief that no commercial activities must be allowed inside the park, but permitting unrestrained development outside, even though the landscape there may be just as outstanding. America has never quite grasped that you can live in a place without making it ugly, that beauty doesn't have to be confined behind fences, as if a national park were a sort of zoo for nature.”

“Building a museum case and filling it with types of mussels is one way of knowing mussels; but on the shore, a mussel leads to a crab or a curious stone, which leads to another thing and eventually leads back to mussels, which is another and perhaps a more far-reaching way to know mussels. The sea that always seems like a metaphor, but one that is always moving, cannot be fixed, like a heart that is a like a tongue that is like a mystery that is like a story that is like a border that is like something altogether different and like everything at once. One thing leads to another, and this is the treasure that always runs through your fingers and never runs out.”

“And before long there will be no more milk in bottles delivered to the doorstep or sleepy rural pubs, and the countryside will be mostly shopping centers and theme parks. Forgive me. I don't mean to get upset. But you are taking my world away from me, piece by little piece, and sometimes it just pisses me off. Sorry.”

“I mention all this to make the point that if you were designing an organism to look after life in our lonely cosmos, to monitor where it is going and keep a record of where it has been, you wouldn't choose human beings for the job.But here's an extremely salient point: we have been chosen, by fate or Providence or whatever you wish to call it. It's an unnerving thought that we may be living the universe's supreme achievement and its worst nightmare simultaneously.Because we are so remarkably careless about looking after things, both when alive and when not, we have no idea-- really none at all-- about how many things have died off permanently, or may soon, or may never, and what role we have played in any part of the process. In 1979, in the book The Sinking Ark, the author Norman Myers suggested that human activities were causing about two extinctions a week on the planet. By the early 1990s he had raised the figure to about some six hundred per week. (That's extinctions of all types-- plants, insects, and so on as well as animals.) Others have put the figure ever higher-- to well over a thousand a week. A United Nations report of 1995, on the other hand, put the total number of known extinctions in the last four hundred years at slightly under 500 for animals and slightly over 650 for plants-- while allowing that this was "almost certainly an underestimate," particularly with regard to tropical species. A few interpreters think most extinction figures are grossly inflated.The fact is, we don't know. Don't have any idea. We don't know when we started doing many of the things we've done. We don't know what we are doing right now or how our present actions will affect the future. What we do know is that there is only one planet to do it on, and only one species of being capable of making a considered difference. Edward O. Wilson expressed it with unimprovable brevity in The Diversity of Life: "One planet, one experiment."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.We have arrived at this position of eminence in a stunningly short time. Behaviorally modern human beings-- that is, people who can speak and make art and organize complex activities-- have existed for only about 0.0001 percent of Earth's history. But surviving for even that little while has required a nearly endless string of good fortune.We really are at the beginning of it all. The trick, of course, is to make sure we never find the end. And that, almost certainly, will require a good deal more than lucky breaks.”

“There is nothing so American as our national parks. The scenery and the wildlife are native. The fundamental idea behind the parks is native. It is, in brief, that the country belongs to the people, that it is in process of making for the enrichment of the lives of all of us. The parks stand as the outward symbal of the great human principle.”

“Yellowstone National Park is no more representative of America than is Disneyland.”