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2008-01-10 14:17:01

Sweeping sands across the Sahara and other dune expanses are blown by more than just wind, scientists have discovered. Powerful electric fields spring up near the desert floor and propel sand grains into the air. By accounting for this electricity, researchers say they can design better climate change models, and even explain features of the dust on Mars. Scientists have long been at a loss to explain why sand sweeping across the desert doesn't bounce higher when the wind gets...


Word of the Day
penuche
  • A fudgelike confection of brown sugar, cream or milk, and chopped nuts.
'Penuche' is a variant of 'panocha,' a coarse grade of sugar made in Mexico. 'Panocha' probably comes from the Spanish 'panoja, panocha,' ear of grain.
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