Turtle shells evolved over the course of 300 million years, but self-defense wasn't the initial driver, researchers think. When you purchase through links on our site, we may earn an affiliate ...

Turtles breathe backwards; that is, when they relax their diaphragms, they inhale rather than exhale. Martha Foley and Curt Stager discuss the... Jun 07, 2012 — Turtles breathe backwards; that is, ...

Discover the shocking story of a turtle with no shell and what happens in this rare and unusual situation.

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, ...