Add Yahoo as a preferred source to see more of our stories on Google. Primatologist Susan Perry of UCLA has spent much of the past 35 years studying the complex social lives of white-faced capuchin ...

High up in the canopy of the Brazilian rainforest, clinging unsteadily to its mother's back, a wild newborn bearded capuchin monkey with a non-functioning left leg was beating the odds. Observations ...

Why are capuchin monkeys kidnapping howler monkey babies in Panama? We investigate this bizarre case of primate abduction with researchers working with the Smithsonian to get to the bottom of this ...