Like salt used as a preservative, high concentrations of dissolved minerals in the wet, early-Mars environment known from discoveries by NASA's Opportunity rover may have thwarted any microbes from developing or surviving.
Space Exploration
Feb 15, 2008
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There is a growing consensus that increased demand for electricity will cement coal’s place in the energy portfolio for years to come. In fact, more than half of the electricity produced in the United States comes from ...
Energy & Green Tech
Feb 15, 2008
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The British government may be rethinking its decision not to pursue manned space missions.
Space Exploration
Feb 15, 2008
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It has been 40 million years since the waters around Antarctica have been warm enough to sustain populations of sharks and most fish, but they may return this century due to the effects of global warming. If they do, the ...
Feb 15, 2008
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For vocal animals, recognising species-specific vocalizations is important for survival and social interactions. In humans, a ‘voice' region has been identified that is sensitive to human voices and vocalizations. As this ...
Feb 15, 2008
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A team of scientists studying the California Current – a slow-moving mass of cold water that travels south along the coast from British Columbia to Baja California – are seeing increasing areas of water off Washington ...
Earth Sciences
Feb 15, 2008
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Frozen in time... frozen in place... frozen solid... All of these phrases have been used to describe Antarctica, and yet they all belie the truth about this southerly point on the globe. Although the area is covered in ...
Environment
Feb 15, 2008
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Bottom trawling, an industrial fishing method that drags large, heavy nets across the seafloor stirs up huge, billowing plumes of sediment on shallow seafloors that can be seen from space.
Feb 15, 2008
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In forests of the northeastern United States, sulfate and nitrate are the dominant dissolved forms of sulfur and nitrogen in precipitation. In winter, these acidic agents accumulate in the snowpack and are released to groundwater ...
Environment
Feb 15, 2008
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If you could hold a giant magnifying glass in space and focus all the sunlight shining toward Earth onto one grain of sand, that concentrated ray would approach the intensity of a new laser beam made in a University of Michigan ...
General Physics
Feb 15, 2008
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