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 ...

A particularly grumpy type of crab scares off predators by growling at them using teeth in its stomach, new research has revealed. The sounds made by both male and female ghost crabs occur during ...

From the Watch Now: Adorable cheetah cubs play at San Diego Zoo, and more of today's top videos series ...