13.3-million–13.6 million-year-old fossils from an extinct relative of the howler monkey show signs of being the first leaf-eating primate in South and Central America. Fossils from jaws of Stirtonia ...

Hear the booming cries that gave the howler its name. Learn just what these vocal monkeys may be trying to say.

Thirteen million years ago, a medium-sized monkey known for guarding its territory among the treetops with a fearsome "howl" started doing something new. This monkey, one of the oldest known ancestors ...

MEXICO CITY (AP) — It’s so hot in Mexico that howler monkeys are falling dead from the trees. At least 83 of the midsize primates, who are known for their roaring vocal calls, were found dead in the ...

A veterinarian feeds a young howler monkey rescued amid extremely high temperatures in Tecolutilla, Tabasco state, Mexico, Tuesday, May 21, 2024. Dozens of howler monkeys were found dead in the Gulf ...

MEXICO CITY — It’s so hot in Mexico that howler monkeys are falling dead from the trees. At least 83 of the midsize primates, who are known for their roaring vocal calls, were found dead in the Gulf ...

Perhaps we have become oblivious to the daily bombardment detailing the catastrophic effects of a warming planet. I am frightened for our future as we are experiencing the most extreme effects ...

On an island in Panama, a fad that one researcher called "viscerally disturbing" has recently taken off among a group of young male monkeys. These adolescents and juveniles have started to kidnap the ...