Mars Rovers Sharpen Questions About Livable Conditions

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.

Coal gasification -- myths, challenges and opportunities

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 ...

Antarctic life hung by a thread during ice ages

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 ...

Bottom trawling impacts, clearly visible from space

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.

Melting snow provides clues for acidification

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 ...

Michigan laser beam believed to set record for intensity

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 ...

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