"When a chimp called Dorothy, who was in her late 40s, died of heart failure, her fellow apes seemed to be stricken by sorrow. As they wrapped their arms around each other in a gesture of solidarity..." Read more: http://www.dailymail.co.uk/sciencetech/article-1223227/Is-haunting-picture-proof-chimps-really-DO-grieve.html#ixzz0o88jMWaz"