When a doctor listens to the heart of a person with a heart murmur, they may hear a whooshing, swishing, humming, or rasping sound. This is due to rapid, turbulent blood flow through the heart.

The saw-scaled viper produces a harsh rasping sound by rubbing its scales together as a warning. This noise often signals that a venomous strike is imminent. Despite its small size, the species is ...

Researchers are studying a desert viper known for producing an unusually harsh rasping sound when threatened. Footage reveals how its scales rub together to create an abrasive noise that travels ...

You wouldn’t want to encounter an angry crab – but as well as brandishing and snapping their claws, scientists have discovered that crabs can also “growl” in a show of aggression. Researchers at the ...

You wouldn’t want to encounter an angry crab – but as well as brandishing and snapping their claws, scientists have discovered that crabs can also “growl” in a show of aggression. Researchers at the ...