Many animals use vocalizations to judge one another's size and physical formidability when in competition for mates or other resources. Now, researchers have found that humans can use nonverbal vocal ...

Cradled inside the hushed world of the womb, fetuses might be preparing to come out howling. In the same way newborn humans can cry as soon as they’re born, common marmoset monkeys (Callithrix jacchus ...

The ultrasonic vocalizations of rats can transmit affective states to listeners. For example, rats typically produce shorter calls in a higher frequency range in social situations (pleasant call: PC), ...