Many animals enter a dormant state to deal with the cold and lack of food. For example, grizzly bears hibernate in mountain ...

What happens when the biodiversity witnessed by one generation fades into memory the next? These questions are crossroads at ...

Every winter, some animals disappear into a deep sleep, surviving the freezing temperatures in hibernation. From bears and ...

Pennsylvania’s Punxsutawney Phil may be the most famous weather-forecasting groundhog, thanks to additional publicity from ...

For nearly 30 million years, a 2,000-pound beast known as the entelodont ruled a sweeping empire from Mongolia to what is now ...

What has puzzled researchers and philosophers for many centuries is the ‘why’ of sleep, along with the ‘how’. We human ...

Paleontologists have been arguing whether modern birds developed before or after the infamous asteroid for decades. Now, a ...

A new review has documented the remarkable journey of Australia's most critically endangered marsupial, the Gilbert's potoroo ...

Animals at Omaha's zoo aren't allowed to mate at will. Space, genetics and overall compatibility are considered, and a master ...