Image of not-to-scale renderings of the skulls of various primate species
Surface Area of Tooth Roots Predicts Primate Body Size
Researchers determine that a primate’s tooth root, and not just its crown, can yield reliable information about body size, but the relationship between root surface area and diet isn’t as clear.
ABOVE: Ashley Deutsch and Adam Hartstone-Rose
Surface Area of Tooth Roots Predicts Primate Body Size
Surface Area of Tooth Roots Predicts Primate Body Size

Researchers determine that a primate’s tooth root, and not just its crown, can yield reliable information about body size, but the relationship between root surface area and diet isn’t as clear.

Researchers determine that a primate’s tooth root, and not just its crown, can yield reliable information about body size, but the relationship between root surface area and diet isn’t as clear.

ABOVE: Ashley Deutsch and Adam Hartstone-Rose

primate research

One chimpanzee grooming another on its chin
Chimps Appear to Treat Others' Wounds Using Insects
Natalia Mesa | Feb 7, 2022
The practice, which hasn’t been previously observed among nonhuman animals, may be a display of empathy. 
macaque in zoo enclosure
Leading Japanese Primate Research Center is Closing
Chloe Tenn | Oct 19, 2021
Kyoto University is shuttering its Primate Research Institute after its director was dismissed for misuse of funding.
What a Video Game Can Reveal About Monkeys’ Minds
Shawna Williams | Apr 1, 2021
Researchers find that the animals can account for others’ behavior and circumstances in their strategies.
Argentina, wildfire, climate change, field research, fire, primates, primatology, ecology, environment
Argentinian Field Site Devastated by Fire
Amanda Heidt | Oct 15, 2020
Roughly half of the howler monkeys in the research preserve have died or remain unaccounted for. Scientists had been studying them for more than 30 years. 
Infant Monkeys Died in Accidental Poisoning at UC Davis Lab
Catherine Offord | Jun 18, 2019
The seven primates came into contact with a dye that was used on their mothers, documents reveal.
nih funding spending bill house of representatives congress nonhuman primates research primate
Lawmakers Push NIH to Reduce Nonhuman Primate Research
Chia-Yi Hou | May 10, 2019
A spending bill approved by a House committee would require the agency to “accelerate” the replacement of nonhuman primates in laboratories starting in October.
rhesus macaque monkey gene editing genetic modification
Monkeys Genetically Edited to Mimic Human Brain Development
Chia-Yi Hou | Apr 10, 2019
Rhesus monkeys engineered to express a human gene reportedly show delayed brain development and better short-term memory. Fellow scientists are raising ethical red flags.
As Primate Research Drops in Europe, Overseas Options Appeal
Katarina Zimmer | Aug 21, 2018
A combination of public opposition, intense regulations, and rising costs in the EU make conditions in China and elsewhere attractive for studying monkeys.
Dopamine Neuron Implants Ease Parkinson’s Symptoms in Monkeys
Sukanya Charuchandra | Jun 20, 2018
The stem cell–derived transplants were stable for 24 months and led to wide-ranging behavioral improvements in the monkeys.  
Monkey Hybrids Challenge Assumptions of What a Species Is
Jim Daley | May 3, 2018
A study finds two species of guenon monkeys in Tanzania have been mating and producing fertile offspring for generations.
Image of the Day: Inner Glow
The Scientist Staff, The Scientist Staff | Feb 26, 2018
Researchers engineered a system for bioluminescent imaging that is as much as 1,000 times stronger than existing methods.
Image of the Day: Size Matters
The Scientist Staff, The Scientist Staff | Feb 23, 2018
The male proboscis monkey’s large nose probably evolved in response to female preference and competition between males.
Scientists Unite to Save “Monkey Island” After Hurricane Maria
Shawna Williams | Feb 1, 2018
Puerto Rico’s Cayo Santiago has hosted decades of research in cognition, primatology, immunization, and other areas.
Operation Monkey Rescue
The Scientist Staff | Jan 31, 2018
Meet the people trying to save a research colony of rhesus macaques living on a small island off the coast of hurricane ravaged Puerto Rico.
Monkeys Cloned by Dolly-the-Sheep Technology
Catherine Offord | Jan 24, 2018
The approach, which has never before been successfully attempted in primates, could lead to improved animal models for human biology and disease.
Image of the Day: Mustachioed Monkey
The Scientist Staff, The Scientist Staff | Jan 18, 2018
A scientist confirms a new species of patas monkey in Ethiopia.
Nonhuman Primate Model of Zika
Tanya Lewis | Jun 28, 2016
Researchers infect rhesus macaques with the virus to better study its effects in humans.
Embattled Chimps Relocate
Kerry Grens | Jan 9, 2016
After losing out on “personhood” in a legal battle, two chimpanzees that were held at a university in New York return to a research center in Louisiana.
Out of Europe?
David Begun | Dec 1, 2015
Instead of getting its start in Africa, humanity may have had more Continental roots.