A close-up composite image of a dust particle. The green patches contain bromine, calcium and/or iron. Courtesy of American Chemical Society hide caption

itoggle caption Courtesy of American Chemical Society

A team at NASA tests possible maneuvers for the Mars rover Spirit to use to escape the soft soil it has been stuck in since April. NASA/JPL-Caltech hide caption

itoggle caption NASA/JPL-Caltech

A new study suggests that crying infants may be imitating the patterns of the language they heard while in the womb. iStockphoto.com hide caption

itoggle caption iStockphoto.com

In this illustration, new viruses emerge from an infected human throat cell. When you get the flu, viruses turn your cells into tiny virus factories that help spread the disease. Courtesy XVIVO/Zirus hide caption

itoggle caption Courtesy XVIVO/Zirus

This retinal prosthesis has been implanted in the eyes of 32 patients. The device receives wireless data from the camera which it then translates into electronic signals that are sent to the brain, restoring sight. Courtesy Second Sight Medical Products, Inc. hide caption

itoggle caption Courtesy Second Sight Medical Products, Inc.

The study tested classically trained violinists and pianists, and found that their brains were much better adapted to discern subtle pitch and tonal differences in sound. iStockphoto.com hide caption

itoggle caption iStockphoto.com