Although they're the most solitary of the great apes, Orangutans still display a great deal of social intelligence. They care for their babies for up to eight years, longer than any animal besides humans, and, unlike other apes, males have never been obse

Although they're the most solitary of the great apes, Orangutans still display a great deal of social intelligence. They care for their babies for up to eight years, longer than any animal besides humans, and, unlike other apes, males have never been obse