Earth
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We summarize the week's scientific breakthroughs every Thursday.
- 			 Earth EarthChina’s deserts expand with population growthCarried forward by winds and sandstorms, the dunes of northern China are expanding at an unprecedented rate, primarily because of human activities that have contributed to erosion. By Ben Harder
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- 			 Earth EarthRome at Risk: Seismic shaking could be long and destructiveIf a large earthquake struck Rome, ground motions could rock the city for up to a minute, threatening many of the city's ancient landmarks. By Sid Perkins
- 			 Earth EarthSpecies-aid budget looks fishyState and federal governments spent $1.4 billion in 2004 on conserving endangered and threatened species, with one-third of that sum going to protect fish. By Janet Raloff
- 			 Earth EarthFinding dirty dieselsJust a few diesel-fueled vehicles account for much of traffic-related soot. By Janet Raloff
- 			 Earth EarthKrakatoa stifled sea level rise for decadesOcean cooling caused by the volcanic eruption of Krakatoa in 1883 kept sea level worldwide in check well into the 20th century. By Sid Perkins
- 			 Earth EarthHow to rate a snowstormScientists have developed a rating scale to assess the impact of major snowstorms that strike the northeastern United States. By Sid Perkins
- 			 Earth EarthGlobal warming may already be a killerEarth's rising temperatures may be a precipitating factor in the extinctions of dozens of tropical frog species. 
- 			 Earth EarthWind Makes Food Retailers GreenerGreen grocers are among food companies turning ever greener owing to huge investments in wind power. By Janet Raloff
- 			 Earth EarthPrions’ dirty little secretThe malformed proteins responsible for mad cow disease bind tightly to clay, a finding that points to farm soil as a potential long-term reservoir for these infective agents. By Janet Raloff
- 			 Earth EarthCold and Deep: Antarctica’s Lake Vostok has two big neighborsTrapped beneath Antarctica's kilometers-thick ice sheet are two immense bodies of water that may harbor ecosystems that have been isolated for millions of years. By Sid Perkins
- 			 Earth Earth2005 was warmest year on recordLast year's global average temperature was the warmest since scientists began compiling records in the late 1800s. By Sid Perkins