Research chimps that reshaped human intelligence studies died in neglect

Pioneering chimpanzee experiments conducted in the early 20th century revealed that apes possess advanced problem-solving and reasoning abilities, challenging the notion that such intelligence was uniquely human. The findings significantly influenced the field of cognitive research and our understanding of animal intelligence. However, after their research roles ended, the chimpanzees were transferred to Berlin, where they endured poor living conditions. Their welfare was largely ignored, and their contributions went unacknowledged by history. New research has recently brought attention to their forgotten stories, raising important questions about ethical responsibilities in scientific experimentation.