Monkeys

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

In the new study, long-tailed macaques, or crab-eating macaques, received kidney tranplants from genetically edited pigs. One of the monkeys survived for just over two years after the transplant.

Monkeys With Transplanted Pig Kidneys Survive for Up to Two Years

The study brings scientists one step closer to conducting trials in human patients, researchers say

A zoo employee weighs a meerkat during the annual weigh-in.

London Zoo Weighs All 14,000 of Its Animals, 'From the Tallest Giraffe to the Tiniest Tadpole'

The annual measurements help zookeepers track each animal's health over time

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

A long-tailed macaque uses a stone to get at food. The striking of one stone on another accidentally creates stone flakes the monkeys don't use.

Stone Flakes Made by Monkeys Raise Questions About Early Human Tools

The flakes accidentally produced by long-tailed macaques resemble those thought to have been made by early humans

Two emperor tamarin monkeys were stolen from their enclosure at the Dallas Zoo on January 30, 2023. 

Animals at the Dallas Zoo Keep Mysteriously Disappearing

In just a few weeks, the zoo has had enclosures tampered with, a clouded leopard escape, two stolen monkeys and a suspicious vulture death

The monkey's skeletal remains

1,700-Year-Old Monkey Skeleton Suggests Diplomatic Ties Between Mesoamerican Powers

Researchers believe the Maya gave the sacrificial female spider monkey to Teotihuacán as a gift years before relations soured

A Japanese macaque atop a tower viewer in Kyoto, Japan

City in Japan Under Siege by Marauding Monkeys

Macaques have attacked more than four dozen people in less than a month

As of June 15, the World Health Organization had recorded a total of 2,103 confirmed monkeypox cases in 42 countries. Pictured: a colorized transmission electron micrograph of monkeypox virus particles (green) cultivated and purified from cell culture

What You Need to Know About the History of Monkeypox

Mired in misconception, the poxvirus is endemic in certain African countries but was rarely reported in Europe and the U.S. until recently

Exotic animals including parrots and monkeys served as pets and entertainment in California in the 1850s.

The Monkeys and Parrots Caught Up in the California Gold Rush

Researchers combed through 19th-century records and found evidence of the species, which joined a menagerie that included Galapagos tortoises and kangaroos

Some 1,500 rhesus macaques live a mile off the eastern shore of Puerto Rico on Cayo Santiago.

The Puerto Rican Island Where 1,500 Monkeys Rule

The Caribbean Primate Research Center on Monkey Island is one of the world’s top institutions for studying primate behavior

One reader wonders how birds stay balanced on tree branches while they’re asleep.   

How Do Birds Stay Upright When They Are Sleeping?

You've got questions. We've got experts

The monkeys escaped into a wooded area where state troopers and state wildlife officials launched a search effort that included the Centers for Disease Control and Prevention (CDC) and Pennsylvania Department of Health officials.

All Animals Are Accounted for After Truck Carrying 100 Lab Monkeys Crashed in Pennsylvania

Only three monkeys escaped during the accident, all of which were successfully recaptured

Before engaging in social behaviors like grooming, bonobos (pictured) employed a "hello" greeting during 90 percent of observed interactions and bid their peers farewell 92 percent of the time.

Bonobos and Chimps Appear to Have 'Hello' and 'Goodbye' Greetings

Like humans, these apes share salutations to start and end interactions

Red-handed tamarins have greater vocal flexibility, using calls ranging from territorial long calls to chirps to trills to communicate, whereas pied tamarins use long whistle-like calls.

Red-Handed Tamarins Can Mimic Other Species' Accents

The South American primates change their calls to communicate with other tamarin species living in shared territories

Some of the animals—including this dog—were buried in pieces of pottery.

Is This 2,000-Year-Old Egyptian Burial Site the World's Oldest Pet Cemetery?

Excavations show how humans treated cats, dogs and monkeys in first- and second-century Egypt

A female macaque relaxes at Jigokudani. The Japanese word means “hell’s valley,” after the volcanic activity that heats the springs.

What Japan's Wild Snow Monkeys Can Teach Us About Animal Culture

Scientists have been studying the primates at some of the nation's hot springs, and what they have learned about evolution is astonishing

Many of the monkeys died young, perhaps as a result of their rapid introduction to a drastically different environment.

Monkeys Found Buried in 2,000-Year-Old Egyptian Pet Cemetery

The primates—likely imported from India to the then-Roman province—were laid to rest with care

Vervet monkeys among fallen dead leaves and grass

Monkeys’ Attraction to Burned Grasslands May Offer Clues to Human Ancestors’ Mastery of Fire

A new study finds monkeys enter charred savannahs to avoid predators, lending support to a controversial theory about what drew hominins to blazes

Wonga Wongue chimpanzees of Gabon usually lie down on their sides to termite fish.

Chimpanzees' Termite Fishing Habits Differ by Regional Groups

Some scientists say the finding is an 'absolute milestone in culture in nature research'

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