Lots of domestic animals are crossbred to make new breeds. Among dogs, for instance, a Siberian retriever is a cross between a Siberian husky and a Labrador retriever, while a cockapoo is a cocker ...

A good way to start an argument among biologists is to ask them what seems a simple question: "What is a species?" To evolutionary theorists, a species is a fundamental unit, and transitions between ...

Let's face it. Centaurs, chimeras, griffins, the Little Mermaid, the Thunder Cats and all those cool hybrid creatures from Avatar: The Last Airbender are just legends and fantasies. And Peter Parker ...

For more on big cats, tune in to Big Cat Week, premiering Monday, Feb. 20, at 9/8c on Nat Geo WILD and learn more about the National Geographic Big Cats Initiative, a global initiative that supports ...