New 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