In a lab tucked away on the Yale University campus, researchers are quietly observing a pair of marmoset monkeys. The scientists have been training these monkeys for months in the art of cooperation.

The prominent noses of male proboscis monkeys, long thought to be merely visual signals, play a crucial role in vocal communication, enhancing individual identity. A new study published in the Journal ...

Researchers found that New World monkeys can produce extreme yodeling-like sounds by rapidly switching between their vocal folds (for low tones) and specialized vocal membranes (for high tones), ...

New study from Hebrew University reveals that marmoset monkeys use specific calls, known as "phee-calls," to name each other, a behavior previously known to exist only in humans, dolphins, and ...