The caption may say that only scientists and trained professionals should handle wild animals, but viewers remember the image, not the words.

A team has solved a years-long mystery mystery with the diagnosis of a rare genetic disease in a Sumatran orangutan.

Orangutans are vocal animals, so analyzing their calls during events like wildfires can indicate how smoke is affecting their health.

Some animals have belly buttons that are easy to see, but others have ones that are more difficult to spot.

Setting aside half of Borneo would significantly reduce their decline, say experts.

Orangutan mothers use a range of techniques to teach their offspring up the age of five - but their tolerance for sharing their food only lasts so long.

Orangutan mothers use a range of techniques to teach their offspring up the age of five - but their tolerance for sharing their food only lasts so long.

Palm oil is responsible for widespread deforestation and labor abuses, but it's also cheap and incredibly useful. That's why many advocates call for reforming the industry, not replacing it.

The lawsuit resembles earlier legal efforts to make tobacco companies remedy wrongdoing.

Social learning in orangutans is shaped by their sex, according to a new study. These different sets of ecological knowledge help secure their survival.