Monkey See, Monkey Don’t

“Pasa and Yoyo, two female chimpanzees, are best friends. They spend their afternoons lounging together in the warm grass of the Ngamba Island Chimpanzee Sanctuary in Uganda, grooming and sharing food. Sometimes they even try to escape the grounds together. They are also less likely to steal food from each other, according to the results of a new experiment that pitted friendship against pineapple slices.” NYT (Gift Article): Chimps Steal Less Often From Their Friends, Even When Offered Pineapple. “The discovery may hint at the roots of human norms around fairness and friendship.” (Either that, or Yoyo’s not that into pineapple.)