In addition to the bonobos, chimpanzees are the closest relatives of humans – the genetic makeup of chimpanzees and humans is 98 percent. Chimpanzees also have a pronounced facial expression that is very similar to that of us humans. We were allowed to admire this adult animal in the “Cologne Zoo”. But where is the difference between ape and man?
Intelligence! Only humans are smart enough to build and use tools. In it scientists agreed for a long time. But then they watched as an orangutan on the Southeast Asian island of Borneo lingered motionless on the shore with a spear-like wooden stick. Suddenly he bumped into it. He hunted fish – and knew what he was doing.