When combined with results of other neurological tests, and in the context of a thorough medical history, atrophy of the brain (shown here in an MRI scan) sometimes indicates Alzheimer's. Simon Fraser/Science Source hide caption

itoggle caption Simon Fraser/Science Source

A warning to us all Universal/The Kobal Collection hide caption

itoggle caption Universal/The Kobal Collection

This photograph of Aline Marie praying outside St. Rose of Lima church in Newtown, Conn., has become the focus of a conversation surrounding ethics and photography on NPR's Picture Show blog. Emmanuel Dunand/AFP/Getty Images hide caption

itoggle caption Emmanuel Dunand/AFP/Getty Images

Now that the party is over, are you ready to make good on your New Year's resolutions? Kurt Desplenter/AFP/Getty Images hide caption

itoggle caption Kurt Desplenter/AFP/Getty Images