A study showed an ability to modify sticks and even bend a straight piece of wire into a hook to retrieve food from a tube ...

wrote about these subjects of a chimpanzee intelligence research program he led at the institute in his book “Chimpanzee no Kokoro” (The mind of chimpanzees). Ai was considered the most ...

This story appears in the February 2010 issue of National Geographic magazine. A few years ago, while setting up camp deep in the Congolese rain forest, Dave Morgan and Crickette Sanz heard a ...