 The World Without Us Author: Alan Weisman Manufacturer: Picador ListPrice: $15.00 Offer: $9.99
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 The World Without Us Author: Alan Weisman Manufacturer: Thomas Dunne Books ListPrice: $24.95 Offer: $9.99
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 Your Inner Fish: A Journey into the 3.5-Billion-Year History of the Human Body Author: Neil Shubin Manufacturer: Pantheon ListPrice: $24.00 Offer: $16.32
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 The World Without Us Author: Alan Weisman Manufacturer: Thomas Dunne Books ListPrice: $24.95 Offer: $16.47
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 When the Rivers Run Dry: Water--The Defining Crisis of the Twenty-first Century Author: Fred Pearce Manufacturer: Beacon Press ListPrice: $16.00 Offer: $10.88
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 Six Degrees: Our Future on a Hotter Planet Author: Mark Lynas Manufacturer: National Geographic ListPrice: $26.00 Offer: $17.16
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 The Revenge of Gaia: Earth's Climate Crisis & The Fate of Humanity Author: James Lovelock Manufacturer: Basic Books ListPrice: $15.95 Offer: $10.85
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 Extinction: How Life on Earth Nearly Ended 250 Million Years Ago Author: Douglas H. Erwin Manufacturer: Princeton University Press ListPrice: $24.95 Offer: $16.47
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 With Speed and Violence: Why Scientists Fear Tipping Points in Climate Change Author: Fred Pearce Manufacturer: Beacon Press ListPrice: $24.95 Offer: $16.47
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 Dirt: The Erosion of Civilizations Author: David R. Montgomery Manufacturer: University of California Press ListPrice: $24.95 Offer: $16.47
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 Extinction: How Life on Earth Nearly Ended 250 Million Years Ago Author: Douglas H. Erwin Manufacturer: Princeton University Press ListPrice: $19.95 Offer: $13.57
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 Rare Earth: Why Complex Life Is Uncommon in the Universe Author: Peter Ward Manufacturer: Springer ListPrice: $16.95 Offer: $15.25
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 With Speed and Violence: Why Scientists Fear Tipping Points in Climate Change Author: Fred Pearce Manufacturer: Beacon Press ListPrice: $15.00 Offer: $10.20
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 The Emerald Planet: How Plants Changed Earth's History Author: David Beerling Manufacturer: Oxford University Press, USA ListPrice: $29.95 Offer: $23.96
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 Catastrophes and Lesser Calamities: The Causes of Mass Extinctions Author: Tony Hallam Manufacturer: Oxford University Press, USA ListPrice: $14.95 Offer: $13.45
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 Supercontinent: Ten Billion Years in the Life of Our Planet Author: Ted Nield Manufacturer: Harvard University Press ListPrice: $29.95 Offer: $19.77
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 The Life and Death of Planet Earth: How the New Science of Astrobiology Charts the Ultimate Fate of Our World Author: Peter D. Ward Manufacturer: Holt Paperbacks ListPrice: $16.00 Offer: $12.00
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 Out of Thin Air: Dinosaurs, Birds, and Earth's Ancient Atmosphere Author: Peter Ward Manufacturer: Joseph Henry Press ListPrice: $27.95 Offer: $18.45
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 Rivers in Time Author: Peter D. Ward Manufacturer: Columbia University Press ListPrice: $24.50 Offer: $21.15
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 On Methuselah's Trail: Living Fossils and the Great Extinctions Author: Peter Douglas Ward Manufacturer: W.H. Freeman & Company ListPrice: $12.95 Offer: $11.01
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 The Life and Death of Planet Earth : How the New Science of Astrobiology Charts the Ultimate Fate of Our World Author: Donald Brownlee Manufacturer: Owl Books ListPrice: $15.00
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