More than a century ago, a small group of chimpanzees helped revolutionise the way scientists understood intelligence. Through a series of pioneering experiments on the Spanish island of Tenerife, these apes demonstrated that they could solve problems using insight rather than relying solely on trial and error - a discovery that challenged long-held assumptions about the uniqueness of human reasoning.

What Became of the Chimps Who Revolutionized Our Understanding of Animal Behavior?: It’s a harrowing tale of deadly winters in Berlin captivity

More than a century ago, a small group of chimpanzees helped revolutionise the way scientists understood intelligence. Through a series of pioneering experiments on the Spanish…