Primates

The babies were born on March 21, just six months after their parents were first introduced.

Adorable but Deadly Fluff Balls, Better Known as Pygmy Slow Lorises, Born at the Smithsonian's National Zoo

The two babies are part of an endangered species whose unbearable cuteness has made them a target for wildlife traffickers

For rabbits and hares, females typically weigh more than males, according to a new study.

For Most Mammal Species, Males Actually Aren't Larger Than Females, Study Finds

New research upends a long-held theory that male mammals tend to be bigger than their female counterparts

A mutation in a gene called TBXT may be behind the loss of great apes' tails, according to a new study.

Why Don’t Humans Have Tails? An Old Genetic Mutation Could Explain Why Monkeys, but Not Apes, Have the Extra Appendage

Scientists have pinpointed a genetic change that might have led the ancestors of humans to lose their tails

Northern gannets plunge into the water to hunt in Shetland. This image won the British Waters Wide Angle category.

See 15 Otherworldly Images From the Underwater Photographer of the Year Awards

A hunting monkey, 'kissing' scorpionfish and playful dolphins feature in just a few of the 130 striking photographs distinguished with honors in the competition

In a study of great apes' playful antics, chimpanzees seemed to enjoy slapping adults, especially those that were dozing off.

Great Apes Love to Tease, Poke and Pester, Suggesting the Urge to Annoy Is Millions of Years Old

The desire to get a rise out of others is a 13-million-year-old trait humans and great apes share with a common ancestor, new research suggests

An artist's impression of Gigantopithecus blacki near a forest in southern China.

What Caused the Mysterious Extinction of 'Giganto,' the World's Largest Ape?

The massive primates were unable to shift their diet to keep pace with a changing climate, according to a new study, forcing them to eat less nutritious bark and twigs

These fossilized teeth belonged to a Propliopithecus chirobates, a type of early primate that lived between 29 million and 35 million years ago.

Early Primates May Have Feasted on Soft, Sweet Fruits

An analysis of more than 400 fossilized teeth suggests the creatures weren't eating many seeds, nuts or other hard foods

A turtle appears to smile as a dragonfly alights on its nose.

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

Representing some of the world's best nature photography, the pictures are being put to a popular vote for the People's Choice Award

The monkey "chimera" with two sets of DNA at three days old. Some body parts appear tinted green, because the researchers marked the transplanted cells with fluorescent dye to trace what parts they developed into.

Scientists Created a Monkey With Two Different Sets of DNA

So-called "chimeric" monkeys could help scientists understand human diseases and aid in conservation efforts, but the research raises ethical questions

Bonobos from different social groups will groom each other and share food.

Like Humans, Some Bonobos Cooperate With Outsiders

We might not be the only primates to display helpful behavior toward members of a different social group, a new study suggests

A group of chimpanzees at elevation listen for rivals.

While Some Chimps Go Low, Others Go High to Avoid a Dangerous Fight

Primate groups climb to elevation to scout out rivals and steer clear of clashes

Female chimps at the Taronga Zoo in Sydney, Australia, in 2005. The new study followed 185 chimps in Uganda's Kibale National Park for 21 years.

Wild Female Chimpanzees Go Through Menopause, Study Finds

Until now, menopause had not been documented in wild, non-human animals, except for a few species of toothed whales

As one Nile crocodile rests, another perks up near a river in Tanzania.

Nile Crocodiles Recognize and React to the Sound of Crying Babies

The reptiles may be aware that primate infants are in trouble—and an easy meal

The Tusk Gorilla Trail features 15 life-size sculptures decorated by prominent artists and public figures.

Why a Trail of Life-Size Gorilla Sculptures Popped Up in London

The statues seek to raise awareness of wildlife conservation efforts in Africa

Scientists observed two separate groups of orangutans making biphonations, or two sounds at once.

Orangutans Can Beatbox, Just Like Humans

The primates can simultaneously make sounds with their mouth and throat, a finding that may shed light on the evolution of human speech

The new research sequenced the genomes of more than 230 primate species, 58 percent of which are threatened with extinction.

What the Largest-Ever Study of Primate DNA Reveals About Ourselves

The findings cover not only conservation and primate evolution, but also human health and diseases

Masturbation may help reduce STIs and increase fertilization in male primates.

Male Primate Masturbation May Have Evolved to Prevent STIs

The behavior originated some 40 million years ago to improve breeding success and protect against pathogens, according to a new study

An image of stem cells on a computer screen from 2010. Stem cells have the potential to develop into various types of cells.

Scientists Create 'Synthetic Embryos' From Monkey Cells

By studying lab-grown stem cells, scientists hope to shed light on miscarriages and birth defects

The new baby western lowland gorilla, which was born on May 27.

See the Endangered Gorilla Born at the National Zoo

The baby western lowland gorilla is the zoo's first since 2018

In a recent study, researchers examined 40 videos of great apes spinning on ropes and calculated their average rotational velocity.

Great Apes Love to Spin Around—Here's Why

A recent study suggests that apes, like humans, seek out altered mental states

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