Major studies have found that “orangutans” are entering the “Stone Age”
In February 2022, researchers at the University of tibingen in Germany publicly announced that orangutans had entered the stone age. A recent study found that untrained orangutans instinctively use stones to create sharp stones for cutting. This is the first time that orangutans can make tools and cut. With the accumulation of time, the social behavior of orangutans will become more and more complex.