Researchers conducted a global study of the factors that influence bird sounds, using more than 100,000 audio recordings from around the world. Birds make sounds to communicate, whether to find a ...

All gases expand when the temperature increases, so when lightning superheats the air at just a fraction of a second, the air expands so rapidly that it compresses the air in front of it. Thunder is ...

Bats live in a world of sounds. They use vocalizations both to communicate with their conspecifics and for navigation. For the latter, they emit sounds in the ultrasonic range, which echo and enable ...