A young chimpanzee makes eye contact. New research suggests that chimpanzees are capable of rational thought and changing their decisions when new evidence emerges. Illustration: depositphotos.com

A young chimpanzee makes eye contact. New research suggests that chimpanzees are capable of rational thought and changing their decisions when new evidence emerges. Illustration: depositphotos.com

A young chimpanzee makes eye contact. New research suggests that chimpanzees are capable of rational thought and changing their decisions when new evidence emerges. Illustration: depositphotos.com