“99.99 percent of all species that have ever lived are no longer with us.”

“In three minutes, 98 percent of all the matter there is or will ever be has been produced. We have a universe”

“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 billion years our ancestors have managed to slip through a series of closing doors every time we needed them to.”

“At one time he [Cornelius Vanderbilt] personally controlled some 10 percent of all the money in circulation in the United States.”

“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.”

“Incidentally, disturbance from cosmic background radiation is something we have all experienced. Tune your television to any channel it doesn't receive, and about 1 percent of the dancing static you see is accounted for by this ancient remnant of the Big Bang. The next time you complain that there is nothing on, remember that you can always watch the birth of the universe.”

“The number of people on whose cooperative efforts your eventual existence depends has risen to approximately 1,000,000,000,000,000,000, which is several thousand times the total number of people who have ever lived.”