Touren Pope was rockhounding in the Greater Green River Basin when he found a remarkable foot-long fossil. It turned out to be the shell of a ...

This hunt started with fossil shells but turned into something unexpected. Inside several fossils were calcite crystals formed over thousands of years. Florida geology created the perfect conditions ...

Cartoons often suggest turtles wear shells like removable armor. Those stories show turtles stepping out, swapping shells, or ...

Exceptionally preserved fossils from the Ediacaran period challenge what scientists thought was possible in sandstone. In the fossil record, creatures without hard shells or skeletons, such as ...

How did soft-bodied organisms remain intact for millions of years?

For more than half a century, some of Earth’s strangest fossils looked like they had washed in from an alien world.

An examination of an aquatic, shrimplike creature that lived half a billion years ago offers insight into how arthropods with mandibles became so common. By Rebecca Dzombak About 70 percent of the ...