Howler monkeys are known for their booming calls that can be heard for miles, but the science behind their roar is even more ...

In the deepest hollows of the Ozark Mountains, in places where fog settles low across the ridgelines and the night carries ...

In southern Mexico, the deep and raspy roars of howler monkeys reverberate through the lush jungles enveloping the city of Comalcalco. The sound — akin to the rumble of distant thunder or the grumble ...