Ghost crabs have teeth in their stomachs that they use to growl at one another with, scientists have discovered. This "unusual" communication system, researchers say, is used during aggressive ...

Source: SC Psychological Enterprises Ltd. When a dog growls it is sending a message. The main message is "I feel threatened, but I will defend myself if you come closer. Back off!" If a dog is acting ...

Have you heard strange growling noises while outside this week? According to the Madison County Emergency Management Agency (EMA), the sound is likely coming from the county’s new outdoor alert sirens ...

Bats and death metal singers don’t just share a dark and edgy vibe—they also share vocalization techniques. According to a new study, bats engage their “voice boxes” much like death metal artists do ...