Earth
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We summarize the week's scientific breakthroughs every Thursday.
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- 			 Planetary Science Planetary ScienceCelestial population boomLarge meteoroids are probably more common than telescopic surveys suggest, new analyses find. By Sid Perkins
- 			 Earth EarthUnusual advancesNew glacier model helps explain how ice masses can grow even in a generally warming climate. By Sid Perkins
- 			 Earth EarthSun is setting on incandescent eraAfter more than a century, Edison's light bulbs stand poised to go extinct. By Janet Raloff
- 			 Earth EarthCash for clunkers II: AppliancesStates could soon roll out programs that help consumers replace energy hogging home appliances. By Janet Raloff
- 			 Earth EarthOh, rats — there go the snailsA food fad among introduced rats has apparently crashed a once-thriving population of Hawaii’s famed endemic tree snails. By Susan Milius
- 			 Earth EarthA trip to the garbage patchScientists bring back samples from the oceanic garbage patch off the coast of California. 
- 			 Chemistry ChemistryNitrous oxide fingered as monster ozone slayerNitrous oxide has become the leading threat to the future integrity of stratospheric ozone, scientists report. By Janet Raloff
- 			 Chemistry ChemistryStyrofoam degrades in seawaterStudy suggests besides the visible plastic, smaller bits are fouling the waters 
- 			 Earth EarthScanning the landQuake data analyses yield an improved model of Southern California’s crust. By Sid Perkins
- 			 Animals AnimalsBack off, extinct moaA New Zealand tree’s peculiar leaves may have served as defenses against long-gone giant birds. By Susan Milius
- 			 Animals AnimalsVocal abilities lost, found and drowned outReports from the meeting of the American Ornithologists' Union By Susan Milius