A 260 million-year-old fossil has been determined to be the oldest ancestor of turtles found to date, revealing something about the reptile's mysterious past. Michelle Starr is CNET's science editor, ...

A newly discovered early turtle fossil from 228 million years ago is missing something crucial: its shell. But in the long, intriguing tale of turtle evolution, turtles didn't always have it all -- ...

Humongous Turtle Shell Unearthed. This shows an 8-million-year-old turtle shell that measured nearly 8 feet (2.4 meters) was discovered in Venezuela.

How smushed shells could help to resolve paleontological mysteries. By Asher Elbein You never know where a bit of unusual scientific research is going to lead. Consider a 2012 study about turtle ...

It's a long-held idea that turtles can tuck their heads into their shells when threatened. But is it true? And is this protective trick why turtles the world over have shells today? The answer is that ...

NEW ORLEANS -- It's a marvelously ugly beast, with spiked and ridged armor, a sharply hooked beak, a fishing lure in its mouth and a nasty bite. But the alligator snapping turtle's hard shell holds ...