More than 100 years ago, Golgi staining on nerve cells opened the gates to modern neuroscience. Scientists recently developed the Technicolor version of Golgi staining, Brainbow, allowing more detailed reconstructions of brain circuits. AFP/Getty Images hide caption

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A worker stands on top of a storage bin on July 27, 2011, at a drilling operation in Claysville, Pa. The dust is from powder mixed with water for hydraulic fracturing. Keith Srakocic/AP hide caption

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A new study from the Centers for Disease Control and Prevention finds no link between the number of vaccinations a young child receives and the risk of developing autism spectrum disorders. Jeff J. Mitchell/Getty Images hide caption

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Jonathan Wilker holds up a group of oysters from a tank in his lab at Purdue University. Rebecca Davis/NPR hide caption

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Thousands of "fairy circles" dot the landscape of the NamibRand Nature Reserve in Namibia. Why these barren circles appear in grassland areas has puzzled scientists for years. N. Juergens/AAAS/Science hide caption

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People who are socially isolated may be at a greater risk of dying sooner, a British study suggests. But do Facebook friends count? How about texting? iStockphoto.com hide caption

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Same-sex marriage advocates protest outside the county clerk's office in San Francisco on Feb. 14. Justin Sullivan/Getty Images hide caption

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Future Robot's FURo robot acts as a host. Innorobo.com hide caption

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Fans in the mosh pit during the performance of Liturgy at the 2012 Pitchfork Music Festival in Union Park, Chicago, on July 14, 2012. Roger Kisby/Getty Images hide caption

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Social worker Nuria Casulleres shows a portrait of Audrey Hepburn to elderly men during a memory activity at the Cuidem La Memoria elderly home in Barcelona, Spain, last August. The home specializes in Alzheimer's patients. David Ramos/Getty Images hide caption

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