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Mysteries of the Deep - How Seafloor Drilling Expeditions Revolutionized Our Understanding of Earth History: James Lawrence... Mysteries of the Deep - How Seafloor Drilling Expeditions Revolutionized Our Understanding of Earth History
James Lawrence Powell
R658 Discovery Miles 6 580 Ships in 12 - 17 working days
Four Revolutions in the Earth Sciences - From Heresy to Truth (Hardcover): James Lawrence Powell Four Revolutions in the Earth Sciences - From Heresy to Truth (Hardcover)
James Lawrence Powell
R1,009 R872 Discovery Miles 8 720 Save R137 (14%) Ships in 12 - 17 working days

Over the course of the twentieth century, scientists came to accept four counterintuitive yet fundamental facts about the Earth: deep time, continental drift, meteorite impact, and global warming. When first suggested, each proposition violated scientific orthodoxy and was quickly denounced as scientific -- and sometimes religious -- heresy. Nevertheless, after decades of rejection, scientists and many in the public grew to acknowledge the truth of each theory.

The stories behind these four discoveries reflect more than the fascinating push and pull of scientific work. They reveal the provocative nature of science, which raises profound and uncomfortable truths as it advances. For example, the Earth and the solar system are older than all of human existence; the interactions among the moving plates and the continents they carry account for nearly all of the Earth's surface features; and nearly every important feature of our solar system results from the chance collision of objects in space. Most surprising of all, we have altered the climate of an entire planet and threaten the future of human civilization. This absorbing scientific history is the only book to describe the evolution of these four ideas from heresy to truth, showing how science works in practice and how it inevitably corrects the mistakes of its practitioners. Scientists can be wrong, but science can be trusted. In the process, astonishing ideas are born and, over time, take root.

Dead Pool - Lake Powell, Global Warming, and the Future of Water in the West (Paperback): James Lawrence Powell Dead Pool - Lake Powell, Global Warming, and the Future of Water in the West (Paperback)
James Lawrence Powell
R630 R545 Discovery Miles 5 450 Save R85 (13%) Ships in 12 - 17 working days

Where will the water come from to sustain the great desert cities of Las Vegas, Los Angeles, and Phoenix? In a provocative exploration of the past, present, and future of water in the West, James Lawrence Powell begins at Lake Powell, the vast reservoir that has become an emblem of this story. At present, Lake Powell is less than half full. Bathtub rings ten stories tall encircle its blue water; boat ramps and marinas lie stranded and useless. To refill it would require surplus water - but there is no surplus: burgeoning populations and thirsty crops consume every drop of the Colorado River. Add to this picture the looming effects of global warming and drought, and the scenario becomes bleaker still. "Dead Pool", featuring rarely seen historical photographs, explains why America built the dam that made Lake Powell and others like it and then allowed its citizens to become dependent on their benefits, which were always temporary. Writing for a wide audience, Powell shows us exactly why an urgent threat during the first half of the twenty-first century will come, not from the rising of the seas but from the falling of the reservoirs.

Dead Pool - Lake Powell, Global Warming, and the Future of Water in the West (Hardcover): James Lawrence Powell Dead Pool - Lake Powell, Global Warming, and the Future of Water in the West (Hardcover)
James Lawrence Powell
R1,148 R979 Discovery Miles 9 790 Save R169 (15%) Ships in 12 - 17 working days

Where will the water come from to sustain the great desert cities of Las Vegas, Los Angeles, and Phoenix? In a provocative exploration of the past, present, and future of water in the West, James Lawrence Powell begins at Lake Powell, the vast reservoir that has become an emblem of this story. At present, Lake Powell is less than half full. Bathtub rings ten stories tall encircle its blue water; boat ramps and marinas lie stranded and useless. To refill it would require surplus water--but there is no surplus: burgeoning populations and thirsty crops consume every drop of the Colorado River. Add to this picture the looming effects of global warming and drought, and the scenario becomes bleaker still. "Dead Pool, "featuring rarely seen historical photographs, explains why America built the dam that made Lake Powell and others like it and then allowed its citizens to become dependent on their benefits, which were always temporary. Writing for a wide audience, Powell shows us exactly why an urgent threat during the first half of the twenty-first century will come not from the rising of the seas but from the falling of the reservoirs.

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