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We summarize the week's scientific breakthroughs every Thursday.
- 			 Earth EarthThe magnetic mystery at the center of the EarthThe history of the planet’s all-important magnetic field has scientists ramping up simulations and lab experiments to resolve a baffling paradox. 
- 			 Climate ClimateVirtual twister reveals possible source of tornado longevityFirst computer simulation of a long-lived EF5 tornado may reveal why some twisters stick around. 
- 			 Earth EarthVolcanic activity convicted in Permian extinctionPrecision dating confirms that Siberian volcanic eruptions could have triggered the Permian extinction. 
- 			 Climate ClimateHurricane’s tiny earthquakes could help forecastersHurricane Sandy set off small earthquakes under its eye as it moved up the U.S. East Coast in 2012. The tiny tremors could help researchers track the behavior of future storms, researchers propose. 
- 			 Climate ClimateKatrina’s legacy: Refining hurricane forecastingTen years following Hurricane Katrina’s formation, the storm’s devastating legacy in New Orleans and beyond continues to drive storm forecast improvements. 
- 			 Earth EarthMillions of dollars’ worth of gold and silver found beneath volcanoesA jackpot of dissolved gold and silver discovered in reservoirs of hot water beneath New Zealand’s Taupo Volcanic Zone. 
- 			 Climate ClimateCarbon cuts could save U.S. farmers billions of dollarsReducing carbon emissions could save U.S. agriculture industry billions of dollars annually by curtailing droughts. 
- 			 Microbes MicrobesBacteria in flowers may boost honeybees’ healthy gut microbesHoneybees may deliver doses of probiotics to the hive to help feed baby bees’ microbiome. By Beth Mole
- 			 Earth EarthNepal quake’s biggest shakes relatively spread outThe seismic rumblings of the April 25 Nepal earthquake were mostly in low frequencies that are more likely to collapse large structures, new research suggests. 
- 			 Oceans OceansOcean current simulations could narrow Flight 370 searchAircraft debris found on Réunion Island in the western Indian Ocean could originate from the northern half of Malaysia Airlines Flight 370’s search area, ocean simulations show. 
- 			 Environment EnvironmentDust components may promote obesityFat dust bunnies may contain obesity-boosting chemicals. By Beth Mole
- 			 Climate ClimateIceless Arctic summers now expected by 2050sThe Arctic Ocean will have its first ice-free summer in the 2050s, nine years earlier than previously forecast, according to improved simulations.