Whether Ivan the Terrible was Demjanjuk or Marchenko, it is clear the Ivan the Terrible guard at Treblinka left his mark on the heartbroken victims who live with the scars he inflicted on their souls.

Katherine Applegate's The One and Only Ivan was inspired by a real-life gorilla who lived in a mall in Tacoma, Wash. The author says humans have "a real obligation" to care responsibly for animals ...