New! Sign up for our free email newsletter.
Reference Terms
from Wikipedia, the free encyclopedia

Rhesus Macaque

The Rhesus Macaque (Macaca mulatta), often called the Rhesus Monkey, is one of the best known species of Old World monkeys. It is a typical macaque, common throughout Afghanistan to northern India and southern China. Rhesus Macaques are sexually dimorphic. Adult male Rhesus Macaques measure approximately 53 centimeters on average and weigh an average of 7.7 kilograms. Females are smaller, averaging 47 centimeters in length and 5.3 kilograms in weight. They are brown or grey in color and have pink faces which are typically bereft of fur. Their tails are of medium length and average between 20.7 and 22.9 centimeters. They typically have a lifespan of about 25 years. The Rhesus Macaque is well known to science owing to its relatively easy upkeep in captivity, and has been used extensively in medical and biological research.

Related Stories
 


Health & Medicine News

October 25, 2026

Missing blood pressure medication could mean losing much of its protection against heart attacks and strokes, according to an analysis of more than 91,000 people. Patients who consistently took their medication experienced an 11% reduction in major ...
A major new study reveals that drinking just two alcoholic beverages a day is associated with a 1 in 25 lifetime risk of death from alcohol-related causes, challenging the idea that moderate drinking is harmless. Researchers also found no ...
Scientists have discovered how pancreatic cancer cells continually reshape their genetic makeup to become more aggressive, spread, and evade treatment. In laboratory experiments, blocking a key gene ...
A common, inexpensive medication could hold an unexpected clue to preventing dementia. Researchers found that older adults with a specific genetic profile had a 70% lower relative risk of dementia when taking low-dose aspirin, even though previous ...
A cannabis-derived ingredient commonly found in sleep gummies may be more habit-forming than previously thought, with new research showing that repeated exposure caused tolerance and withdrawal symptoms in mice. Scientists warn that CBN may carry ...
Scientists have uncovered a surprising new clue to why the Mediterranean diet is so good for the heart, brain, and healthy aging. Researchers at USC found that older adults who closely followed the diet had higher levels of two tiny proteins, ...
A small device that gently stimulates nerves through the ear could offer a new way to tackle stubborn high blood pressure. In a clinical trial of 63 patients already taking medication, the treatment proved safe, easy to use at home, and well ...
A major study has uncovered hidden warning signs of inflammatory bowel disease in the blood up to 10 years before diagnosis. Researchers discovered distinct antibody patterns that could help predict ...
Scientists have discovered that switching off a protein called Mitch makes human cells burn more fat and prevents new fat cells from developing. The breakthrough builds on experiments in mice that showed remarkable resistance to obesity and improved ...
Scientists discovered that the thick, sticky fluid surrounding glioblastoma tumors can make brain cancer cells smaller, more flexible, and better at invading surrounding tissue. Even more troubling, ...
Researchers have uncovered a surprising reason dental implant infections often resist antibiotics: the implants themselves can contribute to the problem. Bacteria corrode titanium implants, releasing microscopic particles that hijack immune cells, ...
A newly FDA-cleared PTSD treatment uses personalized brain mapping and magnetic stimulation to target abnormal brain activity, with a clinical trial reporting a 52% reduction in symptoms and 68% remission. Researchers believe the technology could ...

Latest Headlines

updated 12:56 pm ET