Recursion is when something is built from smaller parts that follow the same pattern. For example, in language, a sentence ...

Though orangutan species were once widespread in mainland southeast Asia, the three that remain are restricted to small populations on Sumatra (Pongo abelii and the newly described P tapanuliensis ...

"It was always assumed … these guys were Pongo abelii, the Sumatran orangutans," he says. An Australian National University graduate student named Anton Nurcahyo had been scouring the world's ...

Pongo abelii, endemic to Sumatra, and Pongo pygmeaeus of the neighboring island of Borneo. A genomic study of the orangutans revealed that the Tapanuli population was the oldest evolutionary ...

A wild male Sumatran orangutan (Pongo abelii) has been observed applying chewed leaves from Akar Kuning (Fibraurea tinctoria) — a climbing plant used in traditional medicine to treat wounds and ...

Since 1994, the team has been studying the wild Sumatran orangutans (Pongo abelii) living at the Suaq Balimbing research site in Indonesia, a protected rainforest area home to about 150 orangutans.

Two unrelated female orangutans (Pongo abelii) were observed on different occasions cannibalizing the remains of their infants, a behavior never before reported in apes. Both orangutans are free ...

On June 25, 2022, field biologist Ulil Azhari was observing a Sumatran orangutan (Pongo abelii) named Rakus in the Suaq Balimbing research area of Indonesia’s Gunung Leuser National Park.

In the dense forests of Indonesia, you can hear strange and haunting sounds. At first, these calls may seem like a random collection of noises – but my rhythmic analyses reveal a different story.

Those noises are the calls of Sumatran orangutans (Pongo abelii), used to warn others about the presence of predators. Orangutans belong to our animal family—we're both great apes. That means we ...