Robert Schwimmer, 66, and his son Scott Schwimmer, 21, spoke with NPR about Robert's wish to hasten his death under certain circumstances. Here — as in the family photo above — they're in Kauai, Hawaii, on the family's "last big trip" after Robert received a 6-month prognosis in October. Courtesy Scott Schwimmer hide caption

itoggle caption Courtesy Scott Schwimmer

When Greg O'Brien was 59 years old he was diagnosed with early-onset Alzheimer's. Now, he's documenting his experience with the disease. Courtesy of Greg O'Brien hide caption

itoggle caption Courtesy of Greg O'Brien

Football rules, uniforms, helmets and protective gear have changed a lot over the years. Keystone-France/Gamma-Keystone via Getty Images hide caption

itoggle caption Keystone-France/Gamma-Keystone via Getty Images

The defending champion and favorite remains the chicken wing. But underdog snacks like the carrot are trying to elbow their way into the competition. Leif Parsons for NPR; Source: whologwhy/Flickr hide caption

itoggle caption Leif Parsons for NPR; Source: whologwhy/Flickr

Think of human relationships as entanglements. How do they bind you; how do they reveal who you really are? Daniel Horowitz for NPR hide caption

itoggle caption Daniel Horowitz for NPR

Harvard University student Elana Simon introduces President Obama before he spoke at the White House Friday about an initiative to encourage research into more precise medicine. Mandel Ngan/AFP/Getty Images hide caption

itoggle caption Mandel Ngan/AFP/Getty Images

Ideally, we'd all eat super healthful diets. But that's not the world we live in, and multivitamins may help bridge the nutritional gaps. Jasper White/Getty Images hide caption

itoggle caption Jasper White/Getty Images

Augustine Goba (right) heads the laboratory at Kenema Government Hospital in Sierra Leone. He and colleagues analyzed the viral genetics in blood samples from 78 Ebola patients early in the epidemic. Stephen Gire/AP hide caption

itoggle caption Stephen Gire/AP

There are more than 160 living Hall of Fame football players. The famous busts of the inductees line the walls in the Pro Football Hall of Fame in Canton, Ohio. JW Ogden/Flickr hide caption

itoggle caption JW Ogden/Flickr