Chimpanzees are similar to humans in many ways. For example, the relationship between chimps is often very close. This was clear when researchers studied a pair of brother and sister chimps, Kanzi and Panbanisha.
The researchers wanted to behavior how well the chimps had learned to make stone knives. So they gave each chimps a box with a banana in it. They also gave the chimps the items they needed to make knives, to cut open the boxes.
Kanzi made a good knife, but his sister could not. When he saw that she was sad, Kanzi tried to give his knife to her. When no one was looking, he put his knife where his sister could find it, and she finally got her banana. Kanzi's laughter showed the researchers that he cared for his sister.
Chimpanzees are similar to humans in many ways. For example, the relationship between chimps is often very close. This was clear when researchers studied a pair of brother and sister chimps, Kanzi and Panbanisha.The researchers wanted to behavior how well the chimps had learned to make stone knives. So they gave each chimps a box with a banana in it. They also gave the chimps the items they needed to make knives, to cut open the boxes.Kanzi made a good knife, but his sister could not. When he saw that she was sad, Kanzi tried to give his knife to her. When no one was looking, he put his knife where his sister could find it, and she finally got her banana. Kanzi's laughter showed the researchers that he cared for his sister.
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