Red-shanked doucs are adept communicators, growling with a fixed stare when they’re threatened, or squealing harshly and slapping tree branches when they’re in distress or startled.

This Majestic Monkey Has Become a Beloved Neighbor for Millions in Vietnam

For the critically endangered red-shanked douc, proximity to an urban center has had surprising benefits

A howler monkey infant, only a few days old, clings to a subadult white-faced capuchin monkey as it uses tools.

Capuchin Monkeys Caught on Camera ‘Abducting’ Baby Howler Monkeys in a Strange Tradition Seen for the First Time

Scientists on Panama’s Jicarón Island were mystified by photos and videos of young male capuchins carrying howler monkeys on their backs for days at a time

A new study suggests chimpanzees don't just perform self-care—in some cases, they look out for each other.

Chimpanzees Perform First Aid on Each Other, Study Finds, and It May Shed Light on the Evolution of Human Health Care

Researchers describe cases of chimps tending to others’ wounds, as well as a chimp that freed another from a snare

A new study finds chimpanzees drum against tree roots with rhythm, suggesting they share an evolutionary trait with humans passed down by a last common ancestor.

Researchers Discover That Chimps Drum Rhythmically, Suggesting Human Musicality Originated in Our Last Common Ancestor

Not only do chimpanzees maintain a rhythm while drumming on tree roots, but two subspecies use distinct tempos and techniques, according to a new study

Scientists analyzed more than 20 years of data on 164 wild mountain gorillas living in Volcanoes National Park in Rwanda.

For Mountain Gorillas, Being Social Comes With Both Benefits and Drawbacks, Study Suggests

A new analysis of wild gorillas in Rwanda indicates the effects of different social styles are dependent on context

Human wounds take longer to heal than the wounds of other mammals, researchers find. That could be because we have fewer hair follicles, and stem cells in hair follicles help regrow skin after an injury.

Human Evolution Traded Fur for Sweat Glands—and Now, Our Wounds Take Longer to Heal Than Those of Other Mammals

Even compared to chimpanzees, one of our closest relatives, humans’ scrapes and cuts tend to stick around for more than twice as long, new research suggests

Two juvenile bonobos embrace in Lola Ya Bonobo Santuary in the Democratic Republic of the Congo. New research suggests female bonobos form coalitions to gain or maintain power in their societies.

Female Bonobos Assert Their Dominance Over Males by Banding Together, New Study Suggests

Bonobos, which are among our closest living relatives, live in rare societies where females tend to outrank males, even though males are larger and stronger. Scientists compiled decades of observations to explain why

For the first time known to scientists, a team has documented chimps sharing alcoholic fruit.

Watch Wild Chimpanzees Share Alcoholic Fruit, a Behavior Just Captured on Video for the First Time

Though the reason behind this action is unclear, researchers suggest socially consuming alcohol may have offered evolutionary benefits to a common ancestor of both humans and chimps

Researchers suggest fire-footed rope squirrels might be a "reservoir species" for mpox, capable of harboring and spreading the virus without becoming sick. Here, one is photographed in Kibale National Park, Uganda.

Squirrels, Not Monkeys, May Be the Animal Source of Mpox, Researchers Suggest

A preliminary study traces an mpox outbreak in a group of Ivory Coast monkeys to the fire-footed squirrel, indicating the rodent may be a natural reservoir for the virus

A young bonobo female responds to group members.

There Might Be Something Human in the Way Bonobos Communicate—Their Calls Share a Key Trait With Our Language, Study Suggests

Researchers attempted to decode bonobo calls by recording their social context, then analyzed how the primates string together these vocalizations

Nyota, a 25-year-old male bonobo at Ape Initiative in Iowa, participated in the study.

When Bonobos Know What You Don’t, They’ll Tell You. It’s a Sign of a Cognitive Ability Called ‘Theory of Mind’

A first-of-its-kind study suggests bonobos, like humans, can understand someone else’s lack of knowledge—and adjust their actions accordingly

Hand-drawn illustration of two of the seven sampled molars from Australopithecus

Ape-Like Human Ancestors Were Largely Vegetarian 3.3 Million Years Ago in South Africa, Fossil Teeth Reveal

Scientists suggest meat consumption was pivotal to humans’ development of larger brains, but the transition probably didn’t start with Australopithecus, according to a new study

A new study on "contagious urination" only looked at captive chimpanzees, but researchers suspect the phenomenon may also exist in the wild.

For Chimpanzees, Peeing May Be Contagious—Just Like Yawning Is for Humans, Study Finds

Scientists suggest captive chimpanzees engage in ‘socially contagious urination’—that is, when one primate starts peeing, others quickly follow suit

A Surinam golden-eyed tree frog calls for a mate, puffing out its cheeks.

See 25 Incredible Images From the Wildlife Photographer of the Year Contest

Cast your vote for your favorite of the photographs, which are all contenders for the People’s Choice award, through January 29

Visitors gather at the foot of Monkey Mountain, an attraction at Frank Buck's Jungle Camp in Massapequa, New York, around 1939.

History of Now

When 170 Wild Monkeys Escaped From a ‘Jungle Camp’ and Terrorized New York

In 1935, dozens of rhesus macaques absconded from Frank Buck’s Long Island menagerie. Nearly a century later, 43 members of the same species broke out of a South Carolina research facility

Officials are trying to recapture more than 40 monkeys that escaped from a research facility in Yemassee, South Carolina.

Forty-Three Monkeys Are on the Loose in South Carolina After Escaping a Research Facility When a Door Was Left Unsecured

Once the first primate made a break, the 42 others followed suit in a simple case of monkey-see, monkey-do

Two chimpanzees at the Budongo Conservation Field Station in Uganda

Chimpanzees Take Turns in Fast-Paced Conversations, Just Like Humans Do

A new study finds the average chimpanzee response time in gestured conversations is 120 milliseconds, which isn’t that far from the human average of 200 milliseconds

Wild chimpanzees in Uganda appeared to seek out and eat specific plants with medicinal properties when they were sick.

Chimpanzees May Self-Medicate With Plants, Using the Forest as a Pharmacy

New research suggests sick chimps seek out and eat plants with antibacterial and anti-inflammatory properties—a finding that could advance drug discovery for humans

This fossilized Buronius tooth is roughly a third of an inch long.

Do These Fossilized Teeth Belong to the World’s Smallest Great Ape?

Researchers say two teeth and a kneecap belong to a previously unknown species that lived in what is now Germany

In more than 20 years of field research, Rakus is the first orangutan to be observed using a medicinal plant to treat wounds.

In a First, an Orangutan Healed His Own Wound Using a Known Medicinal Plant

The primate named Rakus chewed up yellow root and applied it to an open facial wound, closing the sore within days

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