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Earth's Wobble Burps
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| Topic: Climate |
09/17/05 |
| Summary: Open University researchers have uncovered startling new evidence about an extreme period of a sudden, fatal dose of global warming some 180 million years ago during the time of the dinosaurs. The scientists' findings could provide vital clues about climate change happening today and in the future. |
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Reducing Early Earth
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| Topic: Climate |
09/11/05 |
| Summary: Using primitive meteorites called chondrites as their models, earth and planetary scientists at Washington University in St. Louis have performed outgassing calculations and shown that the early Earth's atmosphere was a reducing one, chock full of methane, ammonia, hydrogen and water vapor. |
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Asteroid Skywriters
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| Topic: Climate |
08/30/05 |
| Summary: Scientists from the Australian Antarctic Division, the University of Western Ontario, the Aerospace Corporation, and Sandia and Los Alamos national laboratories found evidence that dust from an asteroid burning up as it descended through Earth's atmosphere formed a cloud of micron-sized particles. |
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The Dog Days of the Permian
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| Topic: Climate |
08/27/05 |
| Summary: Scientists at the National Center for Atmospheric Research (NCAR) have created a computer simulation showing Earth's climate in unprecedented detail at the time of the greatest mass extinction in the planet's history. |
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New Window Into Ancient Ozone Holes
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| Topic: Climate |
08/13/05 |
| Summary: British researchers have hit on a clever way to search for ancient ozone holes and their relationship to mass extinctions: measure the remains of ultraviolet-B absorbing pigments ancient plants left in their fossilized spores and pollen. |
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Volcanoes Ate Oxygen
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| Topic: Climate |
08/12/05 |
| Summary: A number of hypotheses have been used to explain how free oxygen first accumulated in Earth's atmosphere some 2.4 billion years ago, but a full understanding has proven elusive. Now a new model offers plausible scenarios for how oxygen came to dominate the atmosphere. |
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Patient Planet: Then and Now
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| Topic: Climate |
06/04/05 |
| Summary: The dramatic and, in some cases, damaging environmental changes sweeping planet Earth are brought into sharp focus in a new atlas launched to mark World Environment Day (WED). |
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Organic-Rich Soup-in-the-Ocean
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| Topic: Climate |
04/07/05 |
| Summary: A new University of Colorado at Boulder study indicates Earth in its infancy probably had substantial quantities of hydrogen in its atmosphere, a surprising finding that may alter the way many scientists think about how life began on the planet. |
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Snowball Earth Scenario
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| Topic: Climate |
03/06/05 |
| Summary: Eons ago, giant clouds in space may have led to global extinctions, according to new research that outlines a rare scenario in which Earth iced over during snowball glaciations, after the solar system passed through dense space clouds. |
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Urban Smog: State of the World
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| Topic: Climate |
10/14/04 |
| Summary: Based on 18 months of Envisat observations, this high-resolution global atmospheric map of nitrogen dioxide pollution makes clear just how human activities impact air quality. |
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