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

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Wes Jackson, founder of the Land Institute, at his farm in Salina, Kan. Richard Harris hide caption

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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

toggle 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

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Every time you crack open a soda, your taste buds may help you get the full experience of the carbonated beverage. Arthur Carlo Franco/iStockphoto.com hide caption

toggle caption Arthur Carlo Franco/iStockphoto.com

A sexton beetle buries a recently deceased shrew. Image courtesy of Fabricator of Useless Articles hide caption

toggle caption Image courtesy of Fabricator of Useless Articles

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