ST. LOUIS — Saint Louis Zoo lost a kind soul on Thursday when they humanely euthanized a 55-year-old chimpanzee who's been a staple at the zoo for the past 17 years. Rosebud, known by her friends as ...

Chimpanzees and bonobos structure their social relationships in similar ways to humans, according to a new international study led by researchers from Utrecht University and Universidad Carlos III de ...

After being cloistered in a basement cage for nearly a year, Tonka just wanted to be outside. Though caretakers had set up a cozy space filled with hammocks and blankets for the chimpanzee, upon ...