Some whittled down to just 30 percent of their original size, an adaptation to increasing temperatures known as the ...

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

A few fossilized body parts hinted at an enigmatic bird's close ties to waterfowl like ducks and geese. A newfound skull may bolster that idea.

A misidentified Diatryma skull from Germany’s Geiseltal region was rediscovered, confirming the rare bird’s herbivorous nature. The fossil was originally unearthed in the 1950s in a former lignite ...

The Earth’s orbit might feel like one of the most fundamental things in our universe, unchanging for billions of years, but ...