Researchers believe the difference in how dogs and cats respond to humans needing help are linked to their evolutionary history.

Learn how dogs, cats, and toddlers were tested for spontaneous helping behavior — and why evolution may explain why most dogs ...

Dogs often help humans like toddlers do, while cats tend to stay independent. Researchers say evolution may explain the ...

A surprising new study from Japan reveals that cats can learn and recognize the names of their fellow household pets, shedding new light on their social cognition.

Domestic dogs, wolves and coyotes can also breed with each other. Horses and donkeys interbreed. A mule is a cross between a ...