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

primates

Three baboons sitting on a tree, looking at the camera
To Mate or Not to Mate? Baboons’ Inbreeding Defense Is Biased
Saugat Bolakhe | Mar 25, 2022
Researchers find that wild baboons are generally good at avoiding inbreeding, but that it’s more likely to occur with paternal than maternal relatives.
colorful parrot-like bird riding a tiny bicycle on a tightrope
Reptiles are the Real Bird Brains
Sophie Fessl | Mar 22, 2022
A research group argues that a species’ number of neurons, rather than brain volume, should serve as indicator of cognitive capacity when studying brain evolution, but some experts voice doubts.
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. 
Small group of Scimitar-horned oryx
Tool Identifies Likely Reservoir Species for SARS-CoV-2
Emma Yasinski | Nov 16, 2021
Researchers used sequencing data and phenotypic traits to predict which of 5,400 species were most likely to be susceptible to contracting and spreading the virus back to humans.
Six primates eat leaves
Umami Taste Receptor Evolved with Primates’ Diets
Abby Olena | Sep 6, 2021
A study suggests that mutations in the gene that encodes the T1R1/T1R3 taste receptor allowed primates that relied on insects for protein to transition to eating leaves and fruit.
US Confirms World’s First SARS-CoV-2 Cases in Gorillas
Max Kozlov | Jan 12, 2021
Zoo officials say the captive primates are recovering, but scientists worry the virus could spread quickly through dwindling wild populations.
Another Ancient Primate Lineage Sailed to South America
Lisa Winter | Apr 10, 2020
A new fossil discovery indicates a second primate group also traversed the Atlantic millions of years ago on a raft of vegetation.
Image of the Day: Wisdom Teeth Lost
Carolyn Wilke | Jan 9, 2019
A study of tiny monkey skulls and teeth suggests that shrinking body size didn’t crowd out wisdom teeth during evolution.
Number-Selective Neurons Found in Untrained Crows’ Brains
Diana Kwon | Mar 15, 2018
The finding suggests corvids may have an innate sense of number.
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.
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.
Lighting Up Monkey Brains
Jyoti Madhusoodanan | Nov 1, 2017
Optogenetic and chemogenetic tools illuminate brain and behavior connections in nonhuman primates.
Orangutans Nurse Their Young for More than Eight Years
Diana Kwon | May 18, 2017
Scientists think these apes switch to breastfeeding during periods of food scarcity.
Orangutan Imitates Human Speech
Tanya Lewis | Jul 27, 2016
Captive ape produces more than 500 vowel-like sounds, offering clues to how speech evolved in humans.
Contributors
Karen Zusi | Dec 1, 2015
Meet some of the people featured in the December 2015 issue of The Scientist.
Out of Europe?
David Begun | Dec 1, 2015
Instead of getting its start in Africa, humanity may have had more Continental roots. 
Book Excerpt from The Real Planet of the Apes
David Begun | Nov 30, 2015
In Chapter 7, “West Side Story: The African Apes of Europe,” author David Begun describes the thrill of excavating ancient European primates.
Speaking of Science
The Scientist Staff | Aug 1, 2014
August 2014's selection of notable quotes
Contributors
Rina Shaikh-Lesko | Jun 1, 2014
Meet some of the people featured in the June 2014 issue of The Scientist