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

Opinions expressed by Forbes Contributors are their own. I write about the world of biology. Life on Earth began over four billion years ago, not long after the Earth was formed. It wasn’t until ...

With many varieties and sizes—they ranged from a millimeter to more than 2 feet (0.6 meters) in length—trilobites proved among the most successful and enduring of all prehistoric animals.

Two underwater sea lilies were eaten and regurgitated around 66 million years ago. They were preserved as fossilized vomit.

CELINA - Though dinosaurs are the most notable of the prehistoric animals, smaller mammals and fish walked and swam in Ohio, ...

Triceratops’ enormous head might have been all it took to send other dinosaurs running—some recovered skulls measure up to 10 feet long. Its head was ornamented with three horns, a short one ...