Between the Old World, which includes Africa and Asia, and the New World, which includes Mexico and Central and South America ...

Casey Affleck is throwing his weight behind a pending bill in the Massachusetts legislature that would prevent infant primates from being removed from their mothers for research, experimentation and ...

Rhesus macaques A photo of a mama with baby, Rhesus Macaques monkeys at Silver Spring State Park, Ocala. Camera used was a Canon R5 with a Sigma 150-500 lens.

In 2007, scientists unraveled the DNA of the rhesus macaque. The species shared about 93% of its DNA with humans, even though macaques branched off from the ape family about 25 million years ago.

Hurricane Maria in 2017 changed the landscape of Cayo Santiago, an island home to roughly 1,800 rhesus macaques. Researchers now study the ways the monkeys have adapted to the changed environment.

MILWAUKEE — An addition to the Milwaukee County Zoo's macaque family arrived when Usagi, a 12-year-old Japanese macaque, welcomed her second baby on June 8, increasing the troop's size to 11 ...

FILE - A rhesus macaque monkey rests his chin on a water pipe on Cayo Santiago, known as Monkey Island off the eastern coast of Puerto Rico, Tuesday, July 29, 2008. (AP Photo/Brennan Linsley, Fiel) ...