20/10/2008

Pesticide concentrations decreasing

The widespread use of pesticides across the United States has been in practice for decades, with little knowledge of the long-term effects on the nation's groundwater.

Engineering nanoparticles for maximum strength

Because they are riddled with defects, bulk crystalline materials never achieve their ideal strength; nanocrystals, on the other hand, are so small there's no room for defects. Yet while nanocrystalline materials may approach ...

Crossing 'a bridge to nowhere'

Despite thousands of years of research, astronomers know next to nothing about how the universe is structured. One strong and accepted theory is that large galaxies are clustered together on structures similar to giant soap ...

Scientists map soils on an extinct American volcano

Union County New Mexico is a landscape of striking diversity. Out of expansive rangelands rise sporadic yet majestic cinder cone volcanoes and mesas preserved by basalt, part of the Raton-Clayton Volcanic Field. Capulin volcano, ...

Race for better superconductors heats up

Scientists have discovered a new family of superconductors -- materials that carry electricity more efficiently than copper and other metals -- whose properties rekindle enthusiasm about the possibility that these exotic ...

Squeezing more synthetic fuel from abundant supplies of coal

Scientists in Italy are reporting that a new process could eliminate key obstacles to expanded use of coal gasification to transform that abundant domestic energy resource into synthetic liquid fuels for cars and trucks. ...

Alternative fuels may drain dwindling water supplies

As the search for new fuels intensifies, researchers in Texas report that switching to certain alternative fuels to power cars, trucks, and SUVs may require the use of much more water than conventional petroleum-based gasoline ...

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