Orangutans are one of the most intelligent primates. They use a variety of sophisticated tools to create elaborate sleeping nests from branches and leaves every night. The learning abilities of apes have been extensively studied.
Which ape is the smartest?
It may be no exaggeration to say that Kanzi, a bonobo monkey that lives in the Great Ape Sanctuary on the outskirts of Des Moines, Iowa, is smarter than a human infant. That's because human babies have to be taught everything, but Kanji mainly learned his skills by observing what other humans and apes are doing. 2012
What are the most aggressive apes?
Both bonobos and chimpanzees show physical aggression more than 100 times more often than humans.