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“In the end, this is a difficult story to sum up. The making of the atomic bomb is one of history's most amazing examples of teamwork and genius and poise under pressure. But it's also the story of how humans created a weapon capable of wiping our species off the planet. It's a story with no end in sight. And, like it or not, you're in it.”

“It's worth remembering that all technology leaves a footprint. For example, our own technology is leaving a footprint in terms of global warming, which could be detected from a long way away. One assumes that a very advanced civilization that has been around maybe millions and millions of years would have an even bigger footprint that might extend beyond its planet to its immediate astronomical environment.”

“Evolving life must experience a vast range of possibilities, based on environmental histories so unpredictable that no realized route - the pathway to consciousness in the form of Homo sapiens or Little Green Men, for example - can be construed as a highway to heaven, but must be viewed as a tortuous track rutted with uncountable obstacles and festooned with innumerable alternative branches. Any reasonably precise repetition of our earthly route on another planet therefore becomes wildly improbable even in a trillion cases.”

“Since the universe must contain millions of appropriate planets, consciousness in some form - but not with the paired eyes and limbs, and the brain built of neurons in the only example we know - may evolve frequently. But if only one origin of life in a million ever leads to consciousness, then Martian bacteria most emphatically do not imply Little Green Men.”

“Although humans have existed on this planet for perhaps 2 million years, the rapid climb to modern civilization within the last 200 years was possible due to the fact that the growth of scientific knowledge is exponential; that is, its rate of expansion is proportional to how much is already known. The more we know, the faster we can know more. For example, we have amassed more knowledge since World War II than all the knowledge amassed in our 2-million-year evolution on this planet. In fact, the amount of knowledge that our scientists gain doubles approximately every 10 to 20 years.”

“The further conquest of space will make it possible, for example, to create systems of satellites making daily revolutions around our planet at an altitude of some 40,000 kilometers, and to assure universal communications and the relaying of radio and television transmissions. Such an arrangement might prove more useful, economically, than the construction of radio relay systems over the whole surface of the earth. The great accuracy of movement of these satellites will provide a reliable basis for solving navigational problems”

“If the ecological crisis, for example, is to be solved and if we are to promote genuine justice and thus bring real peace to the planet-and with it the possibility of improving lives on every level, not just economically, socially, and politically, but spiritually, psychologically, and intellectually-then, just on a practical level, we need to have all of the religions working together.”

“Although population and consumption are societal issues, technology is the business of business. If economic activity must increase tenfold over what it is today to support a population nearly double its current size, then technology will have to reduce its impact twenty-fold merely to keep the planet at its current levels of environmental impact. For example, to stabilize the climate we may have to reduce real carbon emissions by as much as 80 percent, while simultaneously growing the world economy by an order of magnitude.”

“Isaac Watts, of course, is a hymn writer in the tradition of Congregationalism who lived in the seventeenth and early eighteenth century. He is very interesting and important because he was also a metaphysician. He knew a great deal about what was, for him, contemporary science. He was very much influenced by Isaac Newton, for example. There are planets and meteors and so on showing up in his hymns very often. But, again, the scale of his religious imagination corresponds to a very generously scaled scientific imagination.”

“The early Triassic was a period when the planet was recovering from the worst mass extinction it had ever known - that was the end Permian extinction, where climate change caused in part by mega-volcanic eruptions wiped out ninety-five percent of life on Earth. It took about ten or twenty million years for the planet's ecosystems to stabilize. During that time you saw a lot of weird, out-of-balance ecosystems where, for example, crocodile-like predators ripped the crap out of each other along the coasts.”