One Tree Planted on Twitter: "It is International Orangutan Day! Orangutans are incredibly smart. Which probably isn't a huge surprise to you. Recently, an orangutan was photographed in Borneo attempting to use
15 Are orangutans intelligent - Orangutan Foundation International Australia
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Orangutans | National Geographic
Orangutans and Computers — Understanding the Intelligence of Great Apes - YouTube
Orangutan's Vocabularies Are Shaped by Socializing With Others, Just Like Humans | Smart News| Smithsonian Magazine
Indonesia's new forest capital in Borneo heightens fears for orangutans' future | CNN