Earth
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We summarize the week's scientific breakthroughs every Thursday.
- 			 Earth EarthMexican silver made it into English coinsChemical tests of currency help reveal where New World riches flowed. 
- 			 Earth EarthGulf spill harmed small fish, studies indicateEffects vary but dire impacts seen with some very low exposures. By Janet Raloff
- 			 Earth EarthGlobal drought may have changed less than thoughtSimple models have overestimated drying over past 60 years. By Tanya Lewis
- 			 Earth EarthPandas’ home range may move as climate changesWarming might force animals’ food source, bamboo, to higher elevations. 
- 			 Life LifeSeaweed-threatened corals send chemical SOS to fishThe cry for help summons allies to graze away the algal overgrowth. By Susan Milius
- 			 Earth EarthSea level rise overflowing estimatesFuture sea level rise might exceed estimates due to environmental feedbacks. By Tanya Lewis
- 			 Earth EarthNew pathway proposed for ancient floodMeltwaters off the northwestern part of Canada’s ice sheet would have shut down the ocean’s heat circulation 13,000 years ago. By Erin Wayman
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- 			 Climate ClimateExtremely Bad WeatherTeasing out global warming's role in worsening hurricanes, droughts and other extreme events. By Janet Raloff
- 			 Earth EarthHow the Frankenstorm came to lifeHurricane Sandy’s humble birth and growth into a monster storm hold lessons for forecasters. 
- 			 Earth EarthLow central pressure among Hurricane Sandy’s unusual featuresAfter slamming the Caribbean, storm approaches landfall in mid-Atlantic states. 
- 			 Earth EarthOzone hole at smallest size in decadesWarm Antarctic temperatures help preserve UV-protecting layer. By Erin Wayman