Andrew Witty, CEO of GlaxoSmithKline, says that better control of infectious diseases in Africa is allowing chronic diseases to come to the surface. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP

Can you name the 10 emotions conveyed above? The first six are basic emotions. The last four are complex emotions that combine two of the basic ones. (Check at the bottom for the answers.) Courtesy of Aleix M. Martinez hide caption

itoggle caption Courtesy of Aleix M. Martinez

Soldiers participate in physical therapy while using a prosthetic brace called the Intrepid Dynamic Exoskeletal Orthosis (IDEO), which allows them to use and strengthen severely injured legs. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images

In New Hampshire, where the Affordable Care Act remains unpopular, the state has exceeded expectations for insurance enrollments. Credit goes, in part, to a grass-roots campaign to sign people up. Brian Snyder/Reuters /Landov hide caption

itoggle caption Brian Snyder/Reuters /Landov

Nutrition researchers are reaching a new consensus: Cut back on all those refined carbs. And remember that some fat is good. Stacy Spensley/Flickr hide caption

itoggle caption Stacy Spensley/Flickr

When Brad Stevens was young, his only "health insurance" was taking tons of vitamins and spending three hours at the gym every day. But after a serious bike accident and an expensive battle with thyroid cancer, the 59-year-old realized nobody's invincible. Heidi de Marco/Kaiser Health News hide caption

itoggle caption Heidi de Marco/Kaiser Health News

Michelle Nimmons (with the red shoe) poses with some of the students in her sex education program in Denmark, S.C. Courtesy of Michelle Nimmons hide caption

itoggle caption Courtesy of Michelle Nimmons

A boy waits to get vaccinated at an anti-polio campaign in Moradabad, India. Michaeleen Doucleff/NPR hide caption

itoggle caption Michaeleen Doucleff/NPR