A half-shell turtle species that swam in China's coastal waters 220 million years ago is the oldest turtle known to date, a new analysis of fossils reveals. The turtle had a belly shell, but its back ...

Turtle shells are truly remarkable structures. As embryos, turtles’ bones begin to fuse, as ribs, shoulder bones, and vertebrae merge together to form the hard outer shell. That’s an incredible ...

Turtle shells evolved over the course of 300 million years, but self-defense wasn't the initial driver, researchers think.