Apes.

A population of 200 of the world's rarest orangutans was found tucked away in the forests of the island of Borneo, according to the Wildlife Conservation Society (WCS). All subspecies of Bornean orangutans are listed as endangered by the International Union for Conservation of Nature. But scientists estimate just 3,000 to 4,500 individuals are left in the subspecies known as Pongo pygmaeus pygmaeus, making them the most severely threatened. Two-thousand of those live in the Malaysian state of Sarawak in Batang Ai National ...

Humans aren't the only ones who cry "no fair." In a classic test of fairness called the ultimatum game, apes will dole out an equitable share of their bananas - and when they don't, their partners will complain, a new study shows. The findings, published today (Jan. 14) in the Proceedings of the National Academy of Sciences, suggests that humans and chimpanzees may share an evolved sense of fairness common to many cooperative species, said lead study author Darby Proctor, a primatologist at Emory University. "If you're involved in some cooperative act you need to be sure you're engaging in something that's beneficial to you," Proctor told LiveScience. "Comparing your rewards with others' ...