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Stories by Sarah Simpson

Afghanistan's Buried Riches

Geologists say newfound deposits in the embattled country could fulfill the world's desire for rare earth and critical minerals and end opium's local stranglehold in the process

September 22, 2011 — Sarah Simpson

Dropping Acid

Mars may have needed acid rain to stay wet

March 17, 2008 — Sarah Simpson

Catchy Carbon

What Floyd Landis has in common with ocean sediment

October 16, 2006 — Sarah Simpson
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