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We summarize the week's scientific breakthroughs every Thursday.
- 			 Space SpaceNASA picks shuttles’ retirement homesMuseums in New York, California, Florida and Virginia will display the four spacecraft after their final mission in June. By Ron Cowen
- 			 Science & Society Science & SocietyAn update on scientific integrityNew administration rules are a step in the right direction, but much work remains, says a watchdog group. 
- 			 Earth EarthGreat quake one of the biggest ever in JapanBLOG: Magnitude-8.9 tremor will go down in seismology’s record books 
- 			 Space SpaceMeteorites may hold fossils from space — or notSkepticism greets claim that three space rocks may contain microfossils of extraterrestrial bacteria. By Ron Cowen
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- 			 Space SpaceLHC switching gearsThe premier European collider will spend the next month smashing lead nuclei together. By Ron Cowen
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- 			 Humans HumansSwedish academy awardsAs Nobel season opens, one researcher looks back on a century of steadily increasing U.S. dominance. By Science News
- 			 Climate ClimateAnnual Arctic ice minimum reachedMelt isn’t as bad as 2007, but still reaches number three in the record books. 
- 			 Computing ComputingMost influential media Twitter feedsComputer scientists find surprises when they rank top 100.