Laura Ingalls Wilder entertained generations of children with her Little House series, which was loosely based on her family's pioneering life. Her memoir, Pioneer Girl, was published in 2014. South Dakota State Historical Society hide caption

itoggle caption South Dakota State Historical Society

Research into how the human brain develops helps explain why teens have trouble controlling impulses. Leigh Wells/Ikon Images/Corbis hide caption

itoggle caption Leigh Wells/Ikon Images/Corbis

Marie Mutsuki Mockett says the Japanese tradition of Tōrō nagashi — lighting floating paper lanterns in honor of loved ones — reminded her that she was not alone in her grief. Alberto Carrasco Casado/Flickr hide caption

itoggle caption Alberto Carrasco Casado/Flickr