Do chimps grieve? - Boing Boing

Do chimps grieve? - Boing Boing: "This incredible image was shot for National Geographic by Monica Szczupider, and shows chimpanzees at the Sanaga-Yong Chimpanzee Rescue Center in Cameroon. They're observing as the body of an elder troop member named Dorothy is taken to burial. She died at 40 years of age, which is pretty old for a chimpanzee."