The sporting options in Finland are everywhere. Here, two people take advantage of the ice on Lake Hiidenvesi to get some exercise. Sami Uskela/Flickr hide caption

itoggle caption Sami Uskela/Flickr

Coordinating care for high-risk patients was expected to save money and improve quality of care. A Medicare experiment didn't pan out. Roy Scott/Getty Images/Ikon Images hide caption

itoggle caption Roy Scott/Getty Images/Ikon Images

A nanosecond pulsed laser beam starts the photoacoustic imaging process. Geoff Story/Courtesy of Washington University in St. Louis hide caption

itoggle caption Geoff Story/Courtesy of Washington University in St. Louis

The Eastside Bicycle Club on a 35 mile Saturday evening ride with stops for tacos. Carlos Morales hide caption

itoggle caption Carlos Morales

Despite losing his sense of taste and smell to Alzheimer's disease, Greg O'Brien says grilling supper on the back deck with his son on a summer evening is still fun. Sam Broun/Courtesy of Greg O'Brien hide caption

itoggle caption Sam Broun/Courtesy of Greg O'Brien

A daily habit of sugary-sweetened drinks can boost your risk of developing the disease — even if you're not overweight. Ryan Kellman/NPR hide caption

itoggle caption Ryan Kellman/NPR

Giedre (left) and Tal Cohen in March 2013, while Giedre was still healthy. Since then, she's begun having symptoms of Alzheimer's disease. In Giedre's case, the illness is tied to a rare genetic mutation she inherited. Courtesy of Tal Cohen hide caption

itoggle caption Courtesy of Tal Cohen