LORI GRUEN: ‘Do other animals think, and what do they think about? Sarah, a chimpanzee who died last week in her late 50s, offers some important clues. Sarah, who could have been deemed the world’s smartest chimp, was brought to the United States from Africa as an infant to work with David and Ann Premack … Continue reading RIP Sarah: The World’s Smartest Chimp Has Died