Ultrasonic sounds are high-frequency sound waves that exceed 20,000 hertz, a range far beyond what the human ear can detect.

A new contender for a human 'language gene' can change the way that mice squeak when it is incorporated into their DNA.

Here are five creatures with superior hearing abilities that can detect and interpret ultrasonic frequencies: Dogs can hear ...

One part of the study involved recording the mice making ultrasonic chirps. These cries typically occur when pups are separated from their mothers, and later in life males string similar sounds ...