Rocks found along the Colorado River in Arizona turned out to contain fossilized fragments of soft-bodied creatures, ...

Researchers have found an ancient shark fossil in Kentucky’s Mammoth Cave, offering new insight into prehistoric marine ecosystems.

Paleontologists named the worm Kraytdraco spectatus, for its resemblance to a Star Wars monster. They say it sheds light on ...

Learn how the Grand Canyon used to be home to an ancient evolutionary competition that has since left behind a plethora of ...

How it moved, though, is anyone’s guess, for no modern-­day animal resembles this bulbous critter. A fossil of a pleurocystitid, an extinct aquatic animal that lived some 450 million years ago.

Experts have put the normal extinction rate for the planet at between 0.1 and 1 species per 10,000 species/100 years. A mass extinction event is quite different.